Manual transmission rebuild
 

I'm looking for suggestions on finding a shop that has experience working on Getrag manual transmissions. I have a 5 speed in a 1983 300d that is slated to be transplanted into a 1984 300td, but first I'd like to get rid of a clanking rattle that is very annoying at idle WITH THE CLUTCH ENGAGED, so no, it isn't a throw-out bearing. On a website about Porsche 924 I read a post about a similar problem with that model's Getrag 5-speed, something maybe about an additional shaft in the 5-speed box (I think fifth is an overdrive). For a while Porsche was doing a fix on the transmissions, then finally said that it didn't effect function or service life, get used to it. Amerikanisher Schweinhunds! Or words to that effect. In fact the noise hasn't gotten worse in the ten years I've owned the car, and once you're at highway speed the noise isn't noticeable. At idle, or in first gear, it sounds like a 1948 Studebaker truck we used to have around the farm.
Since the transmission will be coming out of the car anyway, and has about 300,000 miles on it, I'm willing to spring for a rebuild if I can find a shop that has access to the parts and knows what they're doing. My guess is that it will ship UPS, so distance shouldn't be a huge concern.
Any ideas would be much appreciated.
SEO

Input bearing?

Sounds like you should sell it to me...

hahahah

Nah, you are already getting the one I'm sending you.

I have the same noise at idle with my 5 spd (out of an 82, 240D) which I was thinking was the output shaft bearing. Also it will pop out of gear going down a steep grade in first as in ascending a steep driveway, solved that problem by shifting into second and using the brakes;) I would be interested if you should find info on a tranny rebuild.

I got a quote of $2000 to rebuild my 5-speed, except that mine (winmutts) needs a few new gears so its above what a normal rebuild would cost.

I spoz that price for a tranny rebuild is not out of line in the real world, as apposed to the "pick it up at the wrecking yard" world.:D I would be interested on any updates, thanks

I am hoping the the shot parts in the 5spd I have inherited are the same as in the similar model 4spd. I plan on this being my winter time project.

If this is the noise I think it is, then, it only stops when the gearbox input shaft is stopped [e.g., clutch down, 1st gear engaged], and it's worse when the gearbox oil is hot.

I know this is going to sound odd to you, but, this sort of noise from this sort of gearbox is;

a) not something to get too excited about
b) typically caused by the engine running a bit roughly

If you rebuild the gearbox, there's every chance that the gearbox will still rattle, though, perhaps the extra friction of the new bearings and seals may stop the free play being taken up noisily as the engine speed changes.

The best way to fix the problem is to fix the rough running problem. I dealt with one like this on a BMW 325 which didn't sound to be running rough, and amazed the car's owner by stopping the gearbox rattle by re-setting the valve clearances!

I'm clueless here :confused:, but interested.


OK, a 4-speed came with some North American models and many Euro's. It's good because:

• you can take better advantage of the diesel torque and horsepower curves

• it's more efficient and gets better mileage

• it's fun to shift

A 5-speed didn't come with any North American models and is limited elsewhere. It's better than a 4-speed and everybody wants one because:

• ...?

• ...?

• ...?

The five speed is a 4spd + overdrive, which is great for highway cruising, it lets you get the RPMS down and save some engine wear/noise/fuel.

Not really...my auto-equipped 300D will easily out accelerate my 5-speed 300TD
Nope, not enough to make it worthwhile
Yep

I went from 22-23 mpg on 4-speed manual to 26-28mpg with a 5-speed

my 4spd manual has been much more efficient than my auto, I went from 26 to 30 MPG when I swapped in the 4 speed. Maybe it isnt faster, but it sure feels faster then the auto. I am one who wants a 5spd, i think the OD will give me another 3 mpg on my mostly highway route to work. If you want a 5spd search www.ebay.de for "5 gang getriebe"

My automatic 300D turbo "feels" faster than my 240D W 617 turbo and manual 4 spd, but they actually are just about the same in acceleration. The 240D gets a bit better mileage despite the 3.69 rear.

Thanks for all the info. Didn't mean to hijacking your thread, "SEO".

I'm hooked on these, so I'll be looking to get one and join the club...