Tranny Rebuild

Rouxzy · 11-14-2003, 12:49 AM

I want to rebuild my tranny this winter and was wandering if there was any referance material out there so that I can rebuild it myself. I checked with Wayne and he does not have any plans to write a rebuild book for the tranny. Any help would surely be appreciated.
Tom

john70t · 11-14-2003, 01:00 AM

There are a whole lot of NLA tools necessary for the home mechanic so I've heard. The least of which is probably a press and jig for the gears. I don't know.

Jim Sims · 11-14-2003, 03:28 AM

The best available references are the factory repair manuals, and the Bentley and Hanyes repair manuals. The required special tools and jigs can still be obtained or fabricated by the DIY or improvised. I highly recommend obtaining the use of a hydraulic shop press; for some of the 915 rebuilding tasks it is immensely useful.

See the below thread but also do further searches using "915" as the key search term.

All the Way Into 915 & Comin Out (Long)

Jim Sims

red-beard · red-beard's Garage

This is for the 901, but it gives a good run through on how to...

http://home.san.rr.com/pb914/

1fastredsc · 11-14-2003, 05:59 AM

When i rebuilt my 915, just did all the stuff that i could with normal tools. So i was able to take reverse and fifth along with input and output shaft (1-4 gears) out. After that i send out my diff case to be cleaned and inspected to fix some broken threads and my gears to be inspected and rebuilt (syncros and all that good stuff). I think in the end i totalled up to about 1.1k total including the replacement of the sliders as well as all the syncros. Plus i had ordered gaskets and seals. Took a lot of the labor charge out of it by doing the easier stuff.

red-beard · red-beard's Garage

The labor for rebuilding a tranny is the cheapest part, usually around $500 or so (8 hours of work). The replacable internals are the expensive part(s).

Eugene at Pelican Parts · 11-14-2003, 07:13 AM

The only special tool I bought was the plastic shift jig for reassembly. I got through the job with normal tools, such as a vice, a large crescent wrench, a cheater pipe, an assortment of striking tools, and a bunch of odds and ends lying around the garage (wood, iron plates, farmer's jack). When it comes time for your project, we'll help you out.

1fastredsc · 11-14-2003, 07:51 AM

Quote:

Originally posted by red-beard
The labor for rebuilding a tranny is the cheapest part, usually around $500 or so (8 hours of work). The replacable internals are the expensive part(s).

Every penny helps, especially when your trying to rebuild the top end of the motor at the same time (like me).

red-beard · red-beard's Garage

I won't disagree with you on that!

howie944 · 11-15-2003, 12:07 AM

Funny you should mention it. Just got mine back today from ol Frank in Sacto after 915 rebuild. Can't sing his praises enough. Got a bag fulla warped toothless broken stuff. Coulda done it myself if he would have stood by my side and let me use his specialty tools. As it was for some of it I did watch. Man the thing was trashed. Picked the worst possible night and worst possible place to go out on me (coasted into a parking lot of a bar that lost its liquor license called the Stagger Inn at about 9 PM on a Sunday night so no direct tow to shop) So I am now 2 tows into my Triple A allotment for this year. Oh well 5 1/2 years of ownership first major hiccup.

moazam · moazam's Garage

Bruce Anderson has an upcoming transmission rebuild class. I was planning on attending it, but unfortunately I won't be in the country during that time.

December 15 & 16, 2003
$400
http://www.911handbook.com/classes_scheduleregistration.html

I took the 911 Tune-up class and was pretty happy with it.

Speedy1 · Speedy1's Garage

Transaxle Engineering Quoted me roughly 200$ a gear set not all will need to be replaced they also said plenty of HD aftermarket parts avable usially averages 1000$ for a rebuild, of a working tranny. Reasonable yes but it's the snow-ball efect well new clutch, pressure plate, T/O bearing, OK new cable , and rebild the peddle cluster It never ends AAAHHH

red-beard · red-beard's Garage

Why would you replace gear sets? If you've broken actual gears, I'd toss the tranny and buy a used one.

$1000 will not buy much of a rebuild. For a full rebuild, there are about $2500 in parts alone.

James

84toy · 01:36 PM

I just finished a rebuild on my 915. I replaced all the synchros, 1st through 4th dog teeth and 2 sliders and all the shift bushings and gaskets for about $800. I'm sure most transmissions won't need all the dog teeth and sliders like mine. No special tools used except a hydraulic press, worn out clutch disk, a torch, a Bentley manual and some patience. Really not too difficult once you take a good look at it.