My Truck:
1987 S10 2.5 lit. 4 Speed Manual
Newly Rebuilt at Raymars
I know the 5 speed manual will work out of a:
1987, 1988, 1989, 1990, 1991.
Can anybody point me to the right direction? Willing to spend good money to get a good used or even refurbished one. I know Upullit has a few s10's with 5 speed's in them. I don't have the tools or the help right now to pull one out myself.
No the pickup out of the four speed won't work, I put one out of a '91 in my '87 tonight and tried it, also the gear isn't there inside of the 5 speed anyway. I'm going to try to find something though befor I speed $150 on an aftermarket speedo.
The electronic trannys run a steel wheel with notches on the shaft,and a electronic pickup in the side of the trans.
The cable trannys run a plastic gear on the tranny,and a plastic gear in the side of the trans,that runs the cable.
Cool. Yah I found one at a yard but I just can't buy it yet is all. Can't wait. I'm hoping it will make it run at a much lower rpm at a higher speed. In 4th gear it runs at almost 3000rpm. Pretty high if you ask me. Should be lower. But its a truck.
I have a question about this. My S10 does have the hydrolic clutch. I know the master cylinder was replaced before. Roswell wrecking has the 5 Speed manual out of an 1988 s10 pick up. But the person on the phone says it won't work. The starter is on the same side but something else won't match up and I thought it would. All this reading I have done and I thought it would just bolt right up pretty much except for the speedo issue.
If you guys can help me out that would be great. If this tranny won't work. What model of tranny can I get to bolt right up without modding too much.
Or is it easier to get the rear differential gears changed so I can go at a higher speed but loose low end power.
If the tranny is indeed a t5, 88 and prior were mechanical speedos. 89 and higher were electronic. They all interchange if they came out of a 2.5l, or 2.8l s10. If you want to keep the stock speedo, then stay with the kind that you have. In your case you have an 87, so anything before 88 will be a direct bolt up if it came from an s10 with either the 2.5l or 2.8l.
I picked up my t5 out of a 90 2.5l S15 and bolted it directly to my 91 2.8l s10. I paid $150 for it, and then a few days later found one for $100, and a running parts truck a few days later with no title for $300. Too bad my wife wouldn't let me grab that one.
Ok, I have never heard of an '87 with a 4 speed tranny. Anyone know if they were available in the later years? I thought they phased all 4 speeds out by '85. Anyway, if you have a 4 speed, the drive shafts are different. The 5 speed shaft is shorter - the 4 speed tranny is shorter than the 5 speed. The easiest thing to do is find a pre 88 tranny and shaft - you will then have a bolt in swap. If you are close to Baton Rouge I have several 5 speeds, both cable and electronic speedos. I think I also have drive shafts.
How much would shipping be on something like that? I live in Albuquerque NM. 87102 zip code. Would I need to pay to get the tranny rebuilt or anything?
Check your glove box for the rear gear code. I think it is probably a 3.73 with a 4 speed. Here are the codes:
GU2 = 2.73 (rare)
GU4 = 3.08
GU5 = 3.23 (rare)
GU6 = 3.42 (best all around gear ratio)
GT4 = 3.73 can also be GQ1
GT5 = 4.10 (rare)
HO4 = 4.10 can also be this code
If there is a G80 after or before any of the G codes it means a Governor Lock diff. These aren't that great for racing, but fine for daily driving.
If you have a 3.73, a 5 speed will reduce your RPM @ 70 MPH to 2900 ~ 3000 RPM - you are probably doing this much @ 60 MPH. With a 3.42 it will be another 500 RPM less. Every half point (gear ratio) means 500 less RPM. If you don't get a tranny, I can provide one. PM me for cost and shipping. Also, check your tranny - if it has a removeable bell it's a BW T4. If not, it's probably an Isuzu unit and the clutch disc is different. I'd replace the cluch assembly while you have it apart - they're really cheap on Ebay.
I see the sticker on the glove box. Where in the hell would it be at though? Its all together. Is the easiest way to print the numbers out and see what one is there? Or do you know the exact spot in the working where it will be.
I live in abq new mexico zip code is 87102.
I will also try and jack the truck up in the next few days so I can take some really good pictures of the tranny and hopefully that will help. As I remember when it was all apart for the big rebuild the bell housing would come off.
What prices are you guys thinking one would cost me? I know shipping is about 100 bucks on its own or more. Over at Rosewell Wrecking they want around 450 shipped for the 1988 s10 2.5 tranny.
If you look at the printed label in the Gbox, you will see codes with a prefix letter and suffix 2 digit number. These are the build code and options for your truck. You'll see the G codes in alphabetic order. They are the rear end identification. As I posted earlier, you can tell what gear set you have by this code unless (obviously) someone changed the rear axle unit. It is unlikely that you have a posi, but stranger things may happen. If you ever do change your rear end, be sure that you don't get a 4x4 rear - they're wider. Your wheels/tires will stick out unless you use the 4x4 wheels/tires.
My '87 Sonoma has a 2.5 with a BorgWarner 4 speed tranny, Just replaced the clutch set, hydraulic hose and clutch fork. last year I replaced the master and slave cylinder. Mine has the reducer gear setup that screws into the trans and then the speedo cable screws into that.
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