Im not sure about the flywheel and driveshaft, but i do know you will have to change to the old style speedometer cable. 84's are cable and 88's are electronic. Im not sure how to convert it either, we put a tranny in my brother's 84 from an 89 and we were goin to have to convert it, but never got time to because 2 weeks later it got totalled. Im sure that you could take it to a transmission shop and they could do it.

 

no, 88's are not electronic. at least mine was cable driven. my 92 was electronic, though.

as far as the flywheel, you are right. you need one from a carbd s-series.

the driveshaft should be the same; mine was when i did the swap.

speedo issues can be resolved with an aftermarket electronic speedo. thats how i went.

 

ok i had thought the 88's were electronic, mine is and it's an 89. I thought 87's were the last year for cable speedos.... ?? not sure.

 

Pretty sure 89 was the swap year. I've had 2 88s and both were cable driven.

 

ok i apprerciate the info neo,... learn somethin new every day right? LoL

 

thanks for the input guys. Turns out the engine/trans i bought must be out of an earlier model cause its externally balanced. Fortunatly for me, the guy not knowing worked out in my favor. Also, glad to hear that I shouldnt have to get a new drive shaft.

 

New development. Got it all back together and it shakes like crazy. I looked at my flexplate that came with the auto and it has no weight. I had the flywheel resurfaced and put in all new clutch parts. I also had to have the driveshaft shortened and balanced. The shaking happens in gear, out of gear, clutch depressed, idling and driving down the street. I am assuming that since my flexplate had no weight anywhere on it, my blazer has had a newer engine installed at some point. the flexplate matches the 88 and up I found on oreilly auto.com. Does the lack of a weight on the flex plate give a definitive answer on the model of my engine? Also, I have read that the weight can be machined off. Anybody have experience with that?

 

If you used a weighted flywheel on an engine that had a non-weighted flexplate I would very confidently say, that is your problem.

I wouldn't start it much less drive it anymore until you get that resolved. The imbalance can cause all sorts of other problems, like ruined engine bearings, and tranny problems.

You shouldn't have needed to shorten your drive shaft, you should have been able to just get one from a truck that had the same body/box and tranny.

 

Thanks, thats what I thought. Just wanted to get clarity from some one who is more familiar with these engines. On the driveshaft, I couldn't find a 2dr 2wd blazer anywhere around here.

 

Really? That's almost the only kind of Blazer/Jimmy that you can find around here. LOL

 

you did put a pilot shaft bushing in the crankshaft right???? it wasnt mentioned before but you definitely need a pilot shaft bushing.

 

yeah. I did that.

 

machine shop wanted 60 bucks to remove the weight. so I just ordered a new one for 62. if any one needs a freshly resurfaced flywheel WITH a weight, let me know.

 

got it back together. I can do it in 30 min all by myself after all this. runs great and nice highway gears now! thanks for the help guys.