10 bolt faq

s106banger · 09-06-2008, 03:18 PM

the 4.10's that i picked up are for a 3 series. i was told the auburn was a 3 series, but ill double check the part numbers. were putting it in at school this friday, i cant wait. thanks for the feed back and numbers.

wolf36520 · 09-19-2008, 02:10 AM

i have a 85 s10 420 hp sbc with a stock diff (7.5) and a 3.08 gear with a minni spool and run in the low 12s it hasnt broke yet but sure it going to eventuly

the_dam_man · 11-24-2008, 07:48 PM

quick question as I prepare for a zetel/4.10 gear install this weekend....

I helped a friend do a Dana44 axle and the carrier shims were between the bearing case and carrier (had to press bearings off and on when changing preload) is it ok to setup a 7.5" rear this way? it made loading the carrier in and out much easier. Per the mopar manual....

1. we measured side to side with no shims or pinion to get a "total" shim thickness. .008" was then added to this for the preload.....later on.

once we setup the pinion we added .040" to each side and dialed in the backlash. once everything was gravy we swapped the new bearings on everything and reassembled it all.

I am planning on the same for my install for a couple reasons:

1. if I ever swap in a different gear and carrier all my shims are contained.
2. installation is easier if everything is contained.

the trick I am using from a friend is to take some old bearings and hone them out so they can be installed and removed by hand (might need minor puller use) so that the carrier and pinion depth can be dialed in with those quicker since no pressing is needed. once everything good swap the good bearings onto the pinion and install it. then install the shims and preloading to the carrier with its new bearings and install. double check everything for pattern and lash and if it is good button up. this keeps you from tearing up your new bearings on the pinion pressing them back and forth.

zerogravity58 · 11-25-2008, 06:21 PM

ive never seen it done this way on a chevy rear. personally i think its pretty easy to press the bearings on and shim it. If you ever swap gears and or carriers yo uwould have to reshim it anyways. The chances of it going back in without any problems are slim.

Deaner · 12-03-2008, 10:35 PM

what do you mean support cover? im thinking that I want to put a stronger rear axle in my 88 2wd dime but am not sure what is out there to swap in. I would like to go to rear disk and bigger spline axle to handle the 355 I put in the truck. im pretty hard on shit and dont want to snap my rear axle and take out my bed.

any suggestions

CobraSpdRH · 12-04-2008, 08:03 PM

So just a quick clarification question, but if I got a 8.5 inch open diff. w/ drum brakes out of a wrecked newer S10 it would have 30 spline axles and a 3.08 gear correct? That is what is listed on Richmond's website but I just wnated to clarify.

Side note, anybody running the powertrax? I have the open diff. with my LQ9, so it desparately needs an upgrade. I am planning 3.73's and powertrax. Thanks

camarslow · 03-09-2009, 04:11 AM

Hey guys, I have a '94 with V6, auto, and a peg leg. From what I've read it should have the 7.625 rear with 28 spline axles. I'm gonna be heading off to the local pull-a-part to pick up a couple things, if I can find one I'm going to grab a posi unit. I've had enough of the one tire fire and general lack of traction, even with new tires.
If what I understood so far is correct, I can grab a posi out of any 10 bolt equipped vehicle that is 1988+ with the 28 spline axles, and is the same carrier series as my stock (pretty sure I've got a 3 series for 3.23+ gears), as long as it's not the 8.5 unit. Please, let me know if I've got any of that wrong, thanks for the help.

khaos288 · 05-19-2009, 07:20 PM

so the ring and pinion from the 7.5 will fit in the 2000 4.3 7.625?

Lenny95NeoN · 06-23-2009, 08:06 PM

Wanna kno somethin strange? I haven't had my Blazer for over 3 years, but I still have that broken 8.5 posi W/discs and factory wheels outta my former 01 Blazer. Maybe I should post in the classifieds.:.

ProjectDyme · 07-21-2009, 07:46 PM

Hey Fellas, new to the forum and 2 the S10 world, been wanting to build a v8 S10 for a while and finally picked 1 up it's mine & my brother's project. we r not rich so it may take a while. I need to know if there is a rearend that we can get from a wreck yard that will bolt on and that it can be a limited slip/posi if there is a difference in them??? The guy we bought it from said it's a one legger. We want it as a toy and play at the track not drive it on the street I think gripping with both tires is better am I right? Any assistance with this is greatly appreciated. thanks.

Black P-38 · 10-15-2009, 02:10 PM

I just read the whole thread, whew... my brain hurts just a little. Great info and I actually retained some of it. I didn't find any answer to my question so I'll post up.

I just bought an '85 Blazer, 2.9 auto 4x4. The info in the glove box says it came with 3.73 posi. I haven't checked the ratio, just the posi when it was on a lift at the tire shop. I spun a wheel and the other rotated the opposite way so at some point in the last 25 years either the carrier or entire rear was replaced with the dreaded one legger.

So here's my question... is there a way to tell how many spline my axles are without opening up the diff?

I know based on the year it should be 26 spline but I have no way to tell if the rear housing is original or correct for the year.

I'm looking for a Posi but don't want to pay for 26 spline axles if it turns out my unit is already a 28 spline unit like from '89 up.

Should I just try to find a complete working later model Posi rear and swap it in so I have the better axles and III series carrier? Or should I just plan on buying a later Posi and 28 spline axles and swap them into my housing?

I guess if I go that route and it turns out to be a 28 spline already, I'd just have a spare pair of axles laying around.

Also, can I reuse my current ring and pinion on the 28 spline Posi?

I'm trying to find out what I can without tearing into the diff since I still need to drive it as long as I can.

THANKS!!!
Mike

zerogravity58 · 10-15-2009, 05:17 PM

you should have 26 spline axles but if your unsure the only way to know 100% is to open it up and pull an axle. It wouldnt take very long to do. Also the G80 locker which these came with is a locker not a posi. it has no clutches in it. I cant remember for sure but i think even with these when you spin the wheels the other will go the opposite way. i would just pop the back cover off and see if you have a G80. All you need is a few quarts of new gear oil and a tube of RTV. If you do chances are its the stock rear from that year. Also yes you can reuse your ring and pinion if they are in good shape.

Black P-38 · 10-16-2009, 11:33 AM

Quote: Originally Posted by zerogravity58

you should have 26 spline axles but if your unsure the only way to know 100% is to open it up and pull an axle. It wouldnt take very long to do. Also the G80 locker which these came with is a locker not a posi. it has no clutches in it. I cant remember for sure but i think even with these when you spin the wheels the other will go the opposite way. i would just pop the back cover off and see if you have a G80. All you need is a few quarts of new gear oil and a tube of RTV. If you do chances are its the stock rear from that year. Also yes you can reuse your ring and pinion if they are in good shape.

Hey Z, Thanks for the fast answers!!!

I didn't realize the difference between Posi and the G-80 as far as wheel rotation. If I already had the V8 installed I could just mash the throttle and see if it's one wheel peel or not... Oh well, doesn't hurt to have a look inside and refill with fresh gear oil.

Thanks for your help!!!
Mike

mr spree · 10-26-2009, 02:46 AM

My 92 S10 has the 10bolt right....or whats in a stock 92 s10 2wd

BudgetNasty · 11-16-2009, 09:33 PM

Quote: Originally Posted by zerogravity58

i wouldnt worry about the axles the axles are not the weak parts in these rearends. If you doing a v8 swap id upgrade to a good posi unit and a good set of 3.73's or 4.10's. ALso buy a support cover and the rear should last you awhile as long as you dont throw slick on it.

what if you put 10" M/T et tires would it blow the rear??

BudgetNasty · 11-18-2009, 09:38 PM

im building my 92 s10 i have the 700R Tranny and 7.625 rear with 308 gears and putting 10" m/t et streets and pushing it with a 350sb what should i do to the tranny and rear???

09-06-2008, 03:18 PM	#201
s106banger i need a paint job Join Date: May 2006 Posts: 863 Location: Medina/UNOH User is: OffLine	Re: 10 bolt faq the 4.10's that i picked up are for a 3 series. i was told the auburn was a 3 series, but ill double check the part numbers. were putting it in at school this friday, i cant wait. thanks for the feed back and numbers.
	[Reply w/Quote]

09-19-2008, 02:10 AM	#202
wolf36520 s10 junky Age: 31 Join Date: Sep 2008 Posts: 29 Location: tucson, az User is: OffLine	Re: 10 bolt faq i have a 85 s10 420 hp sbc with a stock diff (7.5) and a 3.08 gear with a minni spool and run in the low 12s it hasnt broke yet but sure it going to eventuly
	[Reply w/Quote]

11-24-2008, 07:48 PM	#203
the_dam_man Registered User Join Date: Mar 2006 Posts: 285 Location: Dayton, 10-UH-C User is: OffLine	Re: 10 bolt faq quick question as I prepare for a zetel/4.10 gear install this weekend.... I helped a friend do a Dana44 axle and the carrier shims were between the bearing case and carrier (had to press bearings off and on when changing preload) is it ok to setup a 7.5" rear this way? it made loading the carrier in and out much easier. Per the mopar manual.... 1. we measured side to side with no shims or pinion to get a "total" shim thickness. .008" was then added to this for the preload.....later on. once we setup the pinion we added .040" to each side and dialed in the backlash. once everything was gravy we swapped the new bearings on everything and reassembled it all. I am planning on the same for my install for a couple reasons: 1. if I ever swap in a different gear and carrier all my shims are contained. 2. installation is easier if everything is contained. the trick I am using from a friend is to take some old bearings and hone them out so they can be installed and removed by hand (might need minor puller use) so that the carrier and pinion depth can be dialed in with those quicker since no pressing is needed. once everything good swap the good bearings onto the pinion and install it. then install the shims and preloading to the carrier with its new bearings and install. double check everything for pattern and lash and if it is good button up. this keeps you from tearing up your new bearings on the pinion pressing them back and forth.
	[Reply w/Quote]

11-25-2008, 06:21 PM	#204
zerogravity58 Diesel Fan Age: 23 Join Date: Feb 2003 Posts: 1,338 Location: Maryland User is: OffLine	Re: 10 bolt faq ive never seen it done this way on a chevy rear. personally i think its pretty easy to press the bearings on and shim it. If you ever swap gears and or carriers yo uwould have to reshim it anyways. The chances of it going back in without any problems are slim.
	[Reply w/Quote]

12-03-2008, 10:35 PM	#205
Deaner built em to break em Age: 27 Join Date: Jan 2008 Posts: 42 Location: Waterford, MI User is: OffLine	Re: 10 bolt faq what do you mean support cover? im thinking that I want to put a stronger rear axle in my 88 2wd dime but am not sure what is out there to swap in. I would like to go to rear disk and bigger spline axle to handle the 355 I put in the truck. im pretty hard on shit and dont want to snap my rear axle and take out my bed. any suggestions
	[Reply w/Quote]

12-04-2008, 08:03 PM	#206
CobraSpdRH Registered User Join Date: Aug 2006 Posts: 24 Location: User is: OffLine	Re: 10 bolt faq So just a quick clarification question, but if I got a 8.5 inch open diff. w/ drum brakes out of a wrecked newer S10 it would have 30 spline axles and a 3.08 gear correct? That is what is listed on Richmond's website but I just wnated to clarify. Side note, anybody running the powertrax? I have the open diff. with my LQ9, so it desparately needs an upgrade. I am planning 3.73's and powertrax. Thanks
	[Reply w/Quote]

03-09-2009, 04:11 AM	#207
camarslow Registered User Join Date: Mar 2009 Posts: 1 Location: User is: OffLine	Re: 10 bolt faq Hey guys, I have a '94 with V6, auto, and a peg leg. From what I've read it should have the 7.625 rear with 28 spline axles. I'm gonna be heading off to the local pull-a-part to pick up a couple things, if I can find one I'm going to grab a posi unit. I've had enough of the one tire fire and general lack of traction, even with new tires. If what I understood so far is correct, I can grab a posi out of any 10 bolt equipped vehicle that is 1988+ with the 28 spline axles, and is the same carrier series as my stock (pretty sure I've got a 3 series for 3.23+ gears), as long as it's not the 8.5 unit. Please, let me know if I've got any of that wrong, thanks for the help.
	[Reply w/Quote]

05-19-2009, 07:20 PM	#208
khaos288 Registered User Join Date: Mar 2009 Posts: 133 Location: User is: OffLine	Re: 10 bolt faq so the ring and pinion from the 7.5 will fit in the 2000 4.3 7.625?
	[Reply w/Quote]

06-23-2009, 08:06 PM	#209
Lenny95NeoN It WAS a Blazer Age: 32 Join Date: Feb 2004 Posts: 521 Location: Baltimore, Maryland User is: OffLine	Re: 10 bolt faq Wanna kno somethin strange? I haven't had my Blazer for over 3 years, but I still have that broken 8.5 posi W/discs and factory wheels outta my former 01 Blazer. Maybe I should post in the classifieds.:. Last edited by Lenny95NeoN : 06-23-2009 at 08:09 PM.
	[Reply w/Quote]

07-21-2009, 07:46 PM	#210
ProjectDyme Registered User Join Date: Jul 2009 Posts: 1 Location: User is: OffLine	Re: 10 bolt faq Hey Fellas, new to the forum and 2 the S10 world, been wanting to build a v8 S10 for a while and finally picked 1 up it's mine & my brother's project. we r not rich so it may take a while. I need to know if there is a rearend that we can get from a wreck yard that will bolt on and that it can be a limited slip/posi if there is a difference in them??? The guy we bought it from said it's a one legger. We want it as a toy and play at the track not drive it on the street I think gripping with both tires is better am I right? Any assistance with this is greatly appreciated. thanks.
	[Reply w/Quote]

10-15-2009, 02:10 PM	#211
Black P-38 1st Gen Blazer V8 Wannabe Join Date: Aug 2009 Posts: 103 Location: Oregon Coast User is: Online	Re: 10 bolt faq I just read the whole thread, whew... my brain hurts just a little. Great info and I actually retained some of it. I didn't find any answer to my question so I'll post up. I just bought an '85 Blazer, 2.9 auto 4x4. The info in the glove box says it came with 3.73 posi. I haven't checked the ratio, just the posi when it was on a lift at the tire shop. I spun a wheel and the other rotated the opposite way so at some point in the last 25 years either the carrier or entire rear was replaced with the dreaded one legger. *So here's my question... is there a way to tell how many spline my axles are without opening up the diff?* I know based on the year it should be 26 spline but I have no way to tell if the rear housing is original or correct for the year. I'm looking for a Posi but don't want to pay for 26 spline axles if it turns out my unit is already a 28 spline unit like from '89 up. Should I just try to find a complete working later model Posi rear and swap it in so I have the better axles and III series carrier? Or should I just plan on buying a later Posi and 28 spline axles and swap them into my housing? I guess if I go that route and it turns out to be a 28 spline already, I'd just have a spare pair of axles laying around. Also, can I reuse my current ring and pinion on the 28 spline Posi? I'm trying to find out what I can without tearing into the diff since I still need to drive it as long as I can. THANKS!!! Mike
	[Reply w/Quote]

10-15-2009, 05:17 PM	#212
zerogravity58 Diesel Fan Age: 23 Join Date: Feb 2003 Posts: 1,338 Location: Maryland User is: OffLine	Re: 10 bolt faq you should have 26 spline axles but if your unsure the only way to know 100% is to open it up and pull an axle. It wouldnt take very long to do. Also the G80 locker which these came with is a locker not a posi. it has no clutches in it. I cant remember for sure but i think even with these when you spin the wheels the other will go the opposite way. i would just pop the back cover off and see if you have a G80. All you need is a few quarts of new gear oil and a tube of RTV. If you do chances are its the stock rear from that year. Also yes you can reuse your ring and pinion if they are in good shape.
	[Reply w/Quote]

10-16-2009, 11:33 AM	#213
Black P-38 1st Gen Blazer V8 Wannabe Join Date: Aug 2009 Posts: 103 Location: Oregon Coast User is: Online	Re: 10 bolt faq Quote: Originally Posted by zerogravity58 you should have 26 spline axles but if your unsure the only way to know 100% is to open it up and pull an axle. It wouldnt take very long to do. Also the G80 locker which these came with is a locker not a posi. it has no clutches in it. I cant remember for sure but i think even with these when you spin the wheels the other will go the opposite way. i would just pop the back cover off and see if you have a G80. All you need is a few quarts of new gear oil and a tube of RTV. If you do chances are its the stock rear from that year. Also yes you can reuse your ring and pinion if they are in good shape. Hey Z, Thanks for the fast answers!!! I didn't realize the difference between Posi and the G-80 as far as wheel rotation. If I already had the V8 installed I could just mash the throttle and see if it's one wheel peel or not... Oh well, doesn't hurt to have a look inside and refill with fresh gear oil. Thanks for your help!!! Mike
	[Reply w/Quote]

10-26-2009, 02:46 AM	#214
mr spree Whats this for? Age: 20 Join Date: Jan 2008 Posts: 1,010 Location: Spokane WA User is: OffLine	Re: 10 bolt faq My 92 S10 has the 10bolt right....or whats in a stock 92 s10 2wd
	[Reply w/Quote]

11-16-2009, 09:33 PM	#215
BudgetNasty Registered User Age: 24 Join Date: Nov 2009 Posts: 17 Location: User is: OffLine	Re: 10 bolt faq Quote: Originally Posted by zerogravity58 i wouldnt worry about the axles the axles are not the weak parts in these rearends. If you doing a v8 swap id upgrade to a good posi unit and a good set of 3.73's or 4.10's. ALso buy a support cover and the rear should last you awhile as long as you dont throw slick on it. what if you put 10" M/T et tires would it blow the rear??
	[Reply w/Quote]

LinkBacks (?) LinkBack to this Thread: http://www.s10forum.com/forum/f13/10-bolt-faq-129992/
Posted By	For	Type	Date
LS1 S-10 7.5	This thread	Refback	12-30-2007 07:46 PM
V8 Vega	This thread	Refback	12-15-2007 06:03 PM
V8 Vega	This thread	Refback	09-04-2007 09:26 PM
V8 Vega	This thread	Refback	09-04-2007 12:10 AM
MalibuRacing.com Message Boards -- View topic - 7.5 rearend durablity quetion	This thread	Refback	07-01-2007 07:00 AM
MalibuRacing.com Message Boards -- View topic - 7.5 rearend durablity quetion	This thread	Refback	07-01-2007 12:04 AM
MalibuRacing.com Message Boards -- View topic - 7.5 rearend durablity quetion	This thread	Refback	06-30-2007 11:45 PM
MalibuRacing.com Message Boards -- View topic - 7.5 rearend durablity quetion	This thread	Refback	06-30-2007 11:38 PM

11-18-2009, 09:38 PM	#216
BudgetNasty Registered User Age: 24 Join Date: Nov 2009 Posts: 17 Location: User is: OffLine	Re: 10 bolt faq im building my 92 s10 i have the 700R Tranny and 7.625 rear with 308 gears and putting 10" m/t et streets and pushing it with a 350sb what should i do to the tranny and rear???
	[Reply w/Quote]