Never worked right

[5SpdGTP-91]

I've had my car since April. When I brought it there was a slight grind in to third and fifth. Now third sounds like a bike getting run over by a lawn mower anywhere below 4500, and fifth is tolerable; reverse only works if the car is off when shifted. Any saving it?

[TurboGTU]

Sounds like a clutch problem killed your syncros. You might have not completly drained out all the air out or reused a worn pressure plate and trow out bearing. The syncros are gone...and the 3rd gear noise sunds like big mechanical issues down there. Time for a tear down and see the culprit....have another trans at hand though.

[5SpdGTP-91]

My intentions are to buy another one from the junk yard, put it in with the rest of my intended mods, then crack the old one open.

[pocket-rocket]

Since you have a 91 GTP, good luck finding one, and if you find one, plan on forking over a pretty penny. From what I have been told, it take special tools (besides a sledge hammer) to crack open a Getrag 284.

[TurboGTU]

Then he will have to go 282. And whats sooo freaking speacial about the 284 that no one will rebuilt one. People told me that my old Taurus SHO tranny couldn't be rebuilt but I rebuilt that sucker with diferent syncros from other trannies and welded up the trans after a spider gear pin decited to go to uncharted terretori.

[sharkey]

make sure you have the right oil in it. if it has gear oil, drain it out and try some 5w30. gear oil is way to thick for gm fwd standards, and can cause the syncros to not fully aply. try that first before you look or a new tranny.

now if it is an internal problem, there is a reason it happened, and its either clutch or hydralic. does the clutch engauge real low to the floor??? if so, you have a hydralic problem. it would be best to get a new master and slave from gm (i know gm+expensive, but they come as a unit pre-bled, and bleeding them is a huge pain, worth it for the extra $$$). if the pedal was high, your clutch is worn out, but it would be slipping then.

i would put money on it being hydralic problems that caused it to happen. being it has gotten worse, its likely caused internal damage.

[pocket-rocket]

If you have a 284, do not use 5w30. Use GM Syncromesh. There have been quite a few people try different fluids (including me) and the Syncromesh works the best. It my cost alot, but it is worth it.

And whats sooo freaking speacial about the 284 that no one will rebuilt one.

What is sp freakin special is GM made Getrag sign a contract (about 5 years back I belive) saying that they would not sell ANY parts for the 284, and that any 284's that needed serviced/rebuilt will go to Getrag in Detroit for such service. It would be nice to do something like rebuilding one with parts from other trannies, but Nico (a DOHC guru from back in the day) pulled his old one apart and said that the gears were WAY bigger then any other FWD tranny he has ever seen. He works in a BMW dealer and said that the gears in the 284 were about 5mm smaller then the larger of the BMW Getrag trannies. So, good luck finding parts, because I don't have the time or money to go buying any tranny I can find and tear it down to see if parts fit.

[5SpdGTP-91]

The first thing I did was drain the fluid and put in syncromesh. I work at a GM dealership (an apprentice) and went up to parts to see if the rumors of un-rebuildability were true, they're not. My parts manager said that all the parts are available, just not in regular stock and we do have all the special tools. I was on a parts locator and found about a dozen transmissions, the cheapest one was up in Canada.
Also if GM made getrag sign a contract saying that they would not sell any parts for the 284 five years back, wouldn't logic dictate that for the years before the contract was signed replacement parts were made and are in new-old stock?

[pocket-rocket]

I have no idea, this is just what I have been told by everyone, and that no one can find a shop to do a rebuild on them.

[skalor]

The first thing I did was drain the fluid and put in syncromesh. I work at a GM dealership (an apprentice) and went up to parts to see if the rumors of un-rebuildability were true, they're not. My parts manager said that all the parts are available, just not in regular stock and we do have all the special tools. I was on a parts locator and found about a dozen transmissions, the cheapest one was up in Canada.
Also if GM made getrag sign a contract saying that they would not sell any parts for the 284 five years back, wouldn't logic dictate that for the years before the contract was signed replacement parts were made and are in new-old stock?

If this is true, then you just became our parts supplier. :P

[5SpdGTP-91]

I have no idea, this is just what I have been told by everyone, and that no one can find a shop to do a rebuild on them.

Maybe no one has been to a GM dealership?

[sharkey]

the shop i work at did a getrad 284 a while back. we got parts from our local supplyer (they buy cores and sell the good used parts) and the bearing and syncro kit came from gm.

[pocket-rocket]

Wow, this is nice to all of the sudden find out we don't have to pay $3k for a rebuilt tranny. How much was the bearing and syncro kit?

[skalor]

The last time I went to the GM parts warehouse near me, the only thing that was available for the 284 was the axle seals, master/slave cylinders, and clutch components.