| |
Click on image for the lowdown. 
====
| | |
1 members (J Lucas),
85
guests, and
3
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,024 Posts1,055,395 Members48,422 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | 
#47157 07/02/2005 3:09 AM | Joined: Mar 2005 Posts: 49 Member | | Member Joined: Mar 2005 Posts: 49 | Can anybody suggest a syncro 4 speed trans that would bolt up to a torque tube in a 39 pu? Trying to stay some what original with a little more performance. | | |
#47158 07/02/2005 2:29 PM | Joined: Dec 2003 Posts: 1,554 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 1,554 | I dont think changing trannies is going to help performance,unless you go to an overdrive unit.Your rearend gears are what needs to be changed.Gotta get that gear ratio down around,maybe 3:55 or 3:73.That would give you better top speed. | | |
#47159 07/02/2005 5:41 PM | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Do you have a 3 or 4 speed now?
The 4 speeds are non syncro in 39 but the 3 speeds are, they are much easier to shift fast.
There are no syncro 4 speeds that will bolt in without some conversion work.
See the USA in your vintage Chevrolet! My Blog | | |
#47160 07/02/2005 6:15 PM | Joined: Aug 2000 Posts: 800 Shop Shark | | Shop Shark Joined: Aug 2000 Posts: 800 | As Dale said, you might want to check Patrick's for a 3.55 ring and pinion. I swapped my 3 speed for a non synchro 4 speed and have the 3.55's. It's not a truck you wife would drive, but I like it that way. Double clutching all the way. Makes a nice whine and very satisfying to drive correctly. Call Patrick's. He has a torque tube adapter kit to put a saginaw tranny into a 48-54 1/2 ton. Maybe you could get a newer bell housing, saginaw, torque tube........ but the again you have to change the pedal arrangement. Back to square one.  | | |
#47161 07/03/2005 5:22 AM | Joined: Mar 2005 Posts: 637 Shop Shark | | Shop Shark Joined: Mar 2005 Posts: 637 | There have never been any all synchro 4 speed transmissions with connection to a torque tube. Last torque tubes were 1954, the first all synchro 4 speeds were late 1957. | | |
#47162 07/06/2005 7:11 AM | Joined: Mar 2005 Posts: 49 Member | | Member Joined: Mar 2005 Posts: 49 | Thanks for all the great imput guys. I currrently have a 4 speed and was already considering changing the rear ratio to a 3.55 I'm probably going to rebuild my 4 speed to avoid changing the pedal and emergency brake mounts but the 3 speed syncro is also a good thought. I do occasionally like to creep around in the granny and would probably even use it more with the 3.55 rear. Trying to decide if I'm ready to give up my granny. Does anyone know if helical cut gears could at least be used in the old straight gear 4 speed? Thanks for the ideas. | | |
#47163 07/06/2005 7:40 AM | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | Patricks sells an adapter to fit a torque tube to a Saginaw.
Baldy | | |
#47164 07/07/2005 6:26 PM | Joined: Jul 2005 Posts: 2,031 Shop Shark | | Shop Shark Joined: Jul 2005 Posts: 2,031 | google up http://www.smokemup.com/ ... go to auto math to correlate your rear end drive, tranny and RPM. get a 10 or 12 bolt for that old rear end, you can change all you want of that tranny but the rear end WILL limit your top end speed gooday
Jim & Caroline
The highway is for gamblers, better use your good sense."
Gooday-that's my 1¢ answer due to the lousy economy ~ cause I ain't got - no . mo . doe
Every Shaver | Now Can Snore | Six More Minutes | Than Before ... | Half A Pound for Half a Dollar | Spread On Thin | Above the Collar || BURMA-SHAVE
| | |
|
|
| |
