[GTOh!]

Looking at swapping out original M20 transmission for a Tremec 5 speed. The 5 speed will require a shorter shaft and I do't want to cut the original shaft. Who has a nice shaft that I can cut down?

Thanks in advance!

[ROCKETMAN269V]

I have numerous driveshafts. I have shipped all over the country. About what length are you looking for? Thanks, Bob. HAPPY 4th TO ALL.

[Cammer-6]

wow someone with more driveshafts than me.
Kudos

[GTOh!]

Originally Posted by ROCKETMAN269V

I have numerous driveshafts. I have shipped all over the country. About what length are you looking for? Thanks, Bob. HAPPY 4th TO ALL.

Good question. Really dunno yet. Removing the Muncie and installing Tremec TKX 5 speed. Maybe someone else has done this before? I plan to talk to Silver Sport on Monday. I'll ask them about difference in overall length between M20 and TKX. Stay tuned...

Thanks!

[ROCKETMAN269V]

Originally Posted by GTOh!

Good question. Really dunno yet. Removing the Muncie and installing Tremec TKX 5 speed. Maybe someone else has done this before? I plan to talk to Silver Sport on Monday. I'll ask them about difference in overall length between M20 and TKX. Stay tuned...

Thanks!

I just spoke with a guy that did the same thing on a '67 442. Did you get the yoke with the TKX 5 speed? What length is the driveshaft that you have now? Measure from center to center on the u-joints. I may have one that you can have the TKX yoke installed on without shortening. Either way I should have one that will suit your needs. Please let me know. Thanks, Bob.

[AG]

Overall Muncie length is around 20.25" and 24.125" for the TKX.

[GTOh!]

Thanks for all this good info and help, guys! I'll be talking to my Tremec dealer tomorrow. I should have a good idea after I do that and after I get the car up on my lift to take measurements. I'll be back then. Thanks again!

[ROCKETMAN269V]

Any updates? Thanks, Bob.

['ol Pinion head]

Factory driveshaft lengths with factory installed PONTIAC 8.2 10 bolt rear:

'67 Pontiac A-body 4 speed........... 60.00" center to center on u-joints (3R's)
'67 GTO T-400...........................................59.3 75" center to center

'68-72 Pontiac 2 door A-body, most common driveshaft, 56.00" center to center
'68-72 Pontiac 2 door A-body T-400 & '71-72 with Muncie w big output shaft... 55.375"

All above were mfg with a 3R u-joint, IF one is about to upgrade to a built '71-72 8.5 A-Body rear, driveshaft will need to be .875 shorter.

Parts stock... am down to about 1/2 a barrel of nice straight rust free 60's-70's GM A ,GP, & F-body driveshafts, none are in the 56.25" - 56.5" length.
That is an oddball length, don't believe there is factory 3R end driveshaft in that range.

My suggestion with the install of any non stock application transmission or rear end is to install the entire drivetrain before installing the decided on transmission yoke.
With the vehicle up on 4 ramps or on a 4 post lift, properly insert the slip yoke & pull out the prescribed amt (usually 3/4"), then carefully measure center to center
between the u-joint area of the slip yoke & the pinion flange.
,

[Cammer-6]

The ONLY way to measure ^

[ROCKETMAN269V]

Originally Posted by AG

Overall Muncie length is around 20.25" and 24.125" for the TKX.

Originally Posted by 'ol Pinion head

Factory driveshaft lengths with factory installed PONTIAC 8.2 10 bolt rear:
'67 Pontiac A-body 4 speed.....60.00" center to center on u-joints (3R's).....

Based on the above posts, you would need a length of ~56.125" or 56 1/8". My inventory sheet shows 56" and 56 1/4" driveshafts on the rack. Once you get everything worked out, let me have the length and we'll go from there. Thanks, Bob.