What year is this Getrag? (Page 1/1)
fierofool MAY 08, 02:55 PM
The trans has the flip up, copout dipstick.

Tag info is 8XPX. 618XPKM001807
Raydar MAY 08, 03:02 PM
If it has the flipup dipstick, on the side of the differential housing, it's very likely an 88 (or maybe later, if it's a FWD tranny.) I think the earlier ones had the screw-in dipstick/plug on the trunk side of the gearcase.
I can't tell anything from the numbers you posted.

Edit - The PDF Getrag service manual that is floating around was printed in 1987, and shows the screw-in plug.

[This message has been edited by Raydar (edited 05-08-2022).]

fierofool MAY 08, 03:41 PM
Steve, check your phone text msgs.
88 Database Guy MAY 08, 05:17 PM
8XPX is associated with Getrags in 88 GT and FO cars. I don’t know if that was true for 87s though.
Raydar MAY 08, 05:55 PM

quote
Originally posted by fierofool:

Steve, check your phone text msgs.



I did. Last pic looks like an 88 or later.
Guessing the one bolted to the engine is yours. Kind of consistent with what I thought. Looks like an original 87 trans.
Other than the dipstick locations, I don't think there are any differences. They didn't get the sturdier diff bearings until 90 or 91.

Need to take that new trans, and plug a tulip (or axle) into both sides of the diff. Shake one axle up and down. There will be some movement. But there should be NO up/down movement transferred to the other axle/tulip.
fierofool MAY 08, 06:48 PM
The one bolted up is the replacement trans. It has the flip up dipstick. My old 87 trans had the screw in style.

John, thanks. We kind of thought it was 88. Came from a head on collision car 4 or 5 years ago but he didnt know what year.
88 Database Guy MAY 08, 09:23 PM
The 8XPX was the second design of shift fork, which has a different diameter on the bottom bushing than the earlier design. It’s been a loooong time since I had either of my 88GTs transmissions out so I can’t remember if there is any other diff for sure but I know that is one diff.
Raydar MAY 09, 10:30 AM

quote
Originally posted by 88 Database Guy:
... second design of shift fork, which has a different diameter on the bottom bushing than the earlier design.



Shift fork? Or release bearing fork? I forgot about that.

Charlie... if y'all have to remove the release bearing fork, I have the tool.
fierofool MAY 09, 11:03 AM
Thak you. The one in the replacement trans didn't need to be removed. He found that my old release bearing fork was badly worn and also the slave pushrod had started to wear through the release arm. Must have been from all that RFTH clutching over the past 20 years. Surprisingly, the clutch and flywheel were in very good condition and still serviceable. Even so, a new assembly was installed and the flywheel was polished out with some sandpaper.