you destroy the agility of the S2 with the long transmission. A Friend of me, owner of a 930 drove my car yesterday and was very impressed from the performance. He owns a S3 5 Speed with 2.20 final gear ratio a few years ago and sold the car because he don‘t like the behaviour of the Long gearbox. He Said the car feels sleepy.

 

My 928 has a lot of torque that I like and don't want to loose. I'll rebuild and stay with the original manual transmission - Thanks

 

I swapped into german mkt S2 84. Extremely successful. But I know the original was better, like you said. I've also put 89 S4 auto with that special 1 year final ratio into a lethargic 84 USA. Really woke it up. So that final drive ratio is definitely important. Wish there were more choices.

 

Anyone know if the 5 speed Borg Warner 1985 928 S transmission bolts right onto a 1980 (ZF) base 928?

My base 1980 (ZF synchros and parts) is grinding in 1st and Reverse.

IF i HAVE to replace the transmission i'd like to replace it with the Borg Warner transmission that came on the "S" as it was an upgrade from the ZF parts/built transmission.

Will the 928 S Borg Warner transmission bolt right onto my 1980?

If i have to have the 1980 / ZF transmission opened up, will the 928 S Borg Warner synchros and related parts work?

any guidance much appreciated as this is getting expensive - i spent $$$ on the clutch as I erroneously trusted he advice of a West Palm Beach based indie that said my gears grinding in 1st and Reverse was a clutch issue.He's no gone non contact and my car has sat in is lot for weeks and before that months. When I do reach him by phone or text he always has a story. and his Warantee isn't really a warantee. According to his interpretation if he does work that's all he warantees - he doesn't actually warantee a repair even if he didn't fix the specific issue. I dont call him out on his BS as i'm starting to get knowledgeable. Victim awareness is growing via these forums.

However, some are saying now its a gear synchro issue and that a new/rebuilt transmission is going to be the fix for my gears grinding only in 1st and Reverse issue.

The 928 community needs to maintain a unified front against misinformation/disinformation and dishonest indies as there's a lot of misinformation out there on the 928 - the Perfect Porsche. Very frustrating.

 

the 1980 used 2 different 5sp transmissions. Early got the 28:03 and late got the 28:05. If you have the 05 it is a direct swap

 

It depends on whether your '80 has the G28.03 transmission with the longer (1446 mm) torque tube and early rear crossmember, or the G28.05 transmission with the shorter (1416 mm) torque tube and the later crossmember. If it's the latter, then an '85 box will fit.

That said, the '85 box (assuming it's US market G28.11) has a 2.2 rear end, vs. 2.75:1 in the early box. It'll make your '80 somewhat more sluggish off the line.

 

 

Depending on whether your 80 is an early or late manual transmission you're looking at a different torque tube, different subframe and shift linkage.

 

As always, Rob does a much better job

 

Thank you Gentlemen.
If it fits, is the 1985 928 S Borg Warner transmission better than the ZF found in my 1980 base 928?

Did the Borg Warner transmission parts eliminate the gears grinding in 1st and Reverse issue of the ZF transmission in my 1980 base 928? i've had this gears grinding in 1st and Reverse issue now in 2 early/series 1 928s.

Did the ZF transmission have softer synchros? some describe the ZF synchros as "glass" synchros? Or do i have clutch release/hydraulic issue as the indie i used, and paid $$$ to, suggested and not a transmission/synchro issue?

i'm not worried about speed off the line but thanks for mention it.

i just want a reliable/durable transmission if i have to swap this out.

 

I just got a rebuilt transmission for my 1982 5 speed as the prior transmission was grinding only in 1st and Reverse from a dead stop. The gears grinding (only) in 1st and Reverse issue is gone.
However, now, across all gears,the rebuilt transmission requires me to depress the clutch pedal to the floor, hold it flat, shift, pause with the clutch still on the floor, then lift up on the clutch and the car will be in gear.
Even in shifting from 4th to 5th, if I don't depress to flat, pause, shift from 4th to 5th, then pause again, when I lift up on the clutch pedal the transmission will occassionally literally kick the shift stick out of 5th gear into neutral - the shift **** will litterally fight my holding the shift ****/stick in 5th gear and pumch it back out to neutral.
There is no sound of gear synchros grinding - it will just punch the shift stick back into neutral if I don't hold the pedal down long enough during the pause.
This doesn't happen on downshifts - only up shifts.
Please note, i'm not speed shifting - I'm holding the pause for at least 3-5 seconds. I shift and drive these cars very gingerly.
Is this now a clutch not releasing issue as the rebuilt transmission i bought is from a reputable shop.
Any and all thoughts much appreciated/welcome.