Learning to rebuild a trans
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Retired Senior Admin
Expert Gearhead
Joined: May 2006
Posts: 29,661
Likes: 43
From: Sheboygan Wisconsin
Learning to rebuild a trans
I've had a trans sitting here for nearly a year, got a good deal on it and figured I'd get to it some day. Well, today was that day.
Got it mounted on the stand and started removing the side cover.
Got all the bolts out.
Before removing the cover I flipped it and removed the diff cover.
Comes off easy enough.
One HD diff.
Comes out easy too, output shaft came with it, I think that was to go out the other way.
And on the bench with it.
Removing sprockets.
Pulling the shaft.
Flip t back over and remove the cover
Here'* the innards Sensors, and valve body
Removing the wiring harness.
Pulled the pressure switch.
Now off with the oil pump.
And finally the valve body.
Now we have the gears.
4th gear clutch
Hmm, what have we hear? a trans from a 98 with a 4th gear clutch shaft with 09/27/04 date on it. Looks like this trans has been repaired with a new hardened clutch shaft.
Removing more parts.
Input clutch drum
A band
I just keep pulling more parts out.
See, it'* like magic.
Reverse Reaction Shell
Another band.
It'* the last one, I swear.
Flip the trans over again to remove the pan.
Chris showed up to change his thermostat.
So much easier then when your laying under the car.
Last of the parts
Now that is a big pile of parts.
Taking it apart was easy, now to put it back together.
Got it mounted on the stand and started removing the side cover.
Got all the bolts out.
Before removing the cover I flipped it and removed the diff cover.
Comes off easy enough.
One HD diff.
Comes out easy too, output shaft came with it, I think that was to go out the other way.
And on the bench with it.
Removing sprockets.
Pulling the shaft.
Flip t back over and remove the cover
Here'* the innards Sensors, and valve body
Removing the wiring harness.
Pulled the pressure switch.
Now off with the oil pump.
And finally the valve body.
Now we have the gears.
4th gear clutch
Hmm, what have we hear? a trans from a 98 with a 4th gear clutch shaft with 09/27/04 date on it. Looks like this trans has been repaired with a new hardened clutch shaft.
Removing more parts.
Input clutch drum
A band
I just keep pulling more parts out.
See, it'* like magic.
Reverse Reaction Shell
Another band.
It'* the last one, I swear.
Flip the trans over again to remove the pan.
Chris showed up to change his thermostat.
So much easier then when your laying under the car.
Last of the parts
Now that is a big pile of parts.
Taking it apart was easy, now to put it back together.
Thread Starter
Retired Senior Admin
Expert Gearhead
Joined: May 2006
Posts: 29,661
Likes: 43
From: Sheboygan Wisconsin
It'* really not all that hard. Having the engine stand and the bracket I made, thanks to billboost for that idea, and a few tools, it'* rather a easy job. Get a trans service manual, big help there. Just wear rubber gloves and keep everything real clean. I plan to put this one back together, then rip it down again, and do this several times.
Someday, but not today.
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Joined: Jan 2009
Posts: 7,122
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From: Dover, NH
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Posts like a Northstar
Joined: Oct 2009
Posts: 684
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From: Boston Mass
Dan, when you rebuild this trans, make sure that you tighten the clutch clearance in the 2nd and 3rd clutch. GM does not give a spec for this, but we use 1 or 2 oversized steels for the 2nd clutch and use a few early 440-T4 3rd clutches to tighten things up in the 3rd clutch.