Thread: gm b&w t-10 4 speed

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t-10 4 speed, had noise in 1st ,2nd ,3rd but not 4th gear??? pulled trans out, pulled side cover to find a few things,,at least 1 tooth from a gear and some of what looked like chunks of a thust washer??? i have rebuilt a few automatics but never any 4 speeds,,,are they hard to rebuild??/ any help or info would help.. thank-you very much....

Really a good transmission - Here's a picture that may help you identify how things come apart and go back together. You can probably find a manual at a technical book store in your area.

These folks may be a help with parts:
http://www.mackstrans.com/BorgWarnerT10.html
http://www.drivetrain.com/parts_cata...rhaul_kit.html

Good Luck,
Glenn

I've rebuilt Borg Warners and muncies, but haven't done 4-speed work in decades. I would say you need to get an exploded view of your trans.

First you will need to determine what trans it is ...early T-10, with aluminum or iron case ...or Super T-10. There should be some numbers stamped in the case which will indentify it.

If it's a Super T-10, I seem to remember they had straighter cut gears, like an M-22 Muncie, which makes them stronger but noisier. Fourth gear is just a "straight through" mode, so there is no gear noise. You will also need to know what ratio first gear is in the trans, as they vary.

Once you determine these things, you can get a drawing to determine what is damaged, and contact a parts source to see what is needed for a rebuild.

I hope this helps to get you started.

This may seem somewhat oversimplified, but most - not all, grant you - of the american four speeds of the "muscle car era" are quite similar in their design basics. Things you will need to have on hand, besides a good exploded drawing, and if you can find one, a shop manual at best, or a Chilton's or Motor's, or perhaps a Hayne's (all three would be golden) covering the year of your tranny, are a large pan or tray that is big enough to catch parts when they come tumbling out of the case during disassembly, snap ring pliers, some various picks, and one thing a lot of folks don't think about anymore: some stiff cup grease. Another thing that is handy is some means of standing the trans on it's nose, input shaft down. The grease is for setting the many uncaged roller and/or needle bearings during reassembly in these trannys; the most frustrating ones for me are the ones in the input shaft where the output mates into it, and the needles in the cluster gear. Take your time, quit and take a break when things get frustating, and pay really close attention during disassembly; sometimes something will come apart hard, and little needle bearings come falling out from who knows where - well at least that's the way it will seem. They are really a very simple machine, but to a first timer, they can be very daunting. If you start taking the side cover apart be very careful about detent balls and springs in the shift shafts; they can come flying out and will just disappear and frustrate the he&& out of you.

The noise and damage you describe would point me to a sliding gear, or the cluster gear, and the loose stuff says definitely "take it apart, and rebuild it".

Good luck; I know you can do it.

Glenn threw the view up on screen and everybody lost their common sense? what the?????
Two major items outside of the tooth decay you found is input bearing and coutershaft bearings.
The noise comes from reduced gearing in the lower gears and until you reach direct drive (4th), it causes a geometric "whine" or "whir".

Amazing, two posts have been removed.

thanks for your help and the pics, had it rebuilt by trans shop with 20 years of rebuilding transmissions , thanks again