The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 01-01-2005, 02:52 AM   #1
Radke
Registered User
 
Join Date: Apr 2004
Location: Seward Ne.
Posts: 50
Tranny ?

Here gos I have a 3 speed and a Granny 4 and 3.73 posi the question is what trans do i use for better Hiway miles looked at all the books i have and not one has final gear ratio. If some one knows the ratio or can send me to a web site it would help alot.
Radke is offline   Reply With Quote
Old 01-01-2005, 03:24 AM   #2
longhorn71
Senior Member
 
longhorn71's Avatar
 
Join Date: Sep 2004
Location: CANADA
Posts: 1,681
the final drive ratios in both trannys is 1to1.the th350 and th400s have the same final drive ratios too.You could change to an overdrive tranny to get a lower final ratio.Or change the rear gear to a higher speed set to get better gas mileage.if you swap gears you will lose some bottom end power.
longhorn71 is offline   Reply With Quote
Old 01-01-2005, 03:26 AM   #3
Robert1970C20rstbukt
Registered User
 
Robert1970C20rstbukt's Avatar
 
Join Date: Jun 2004
Location: Beeville, Texas
Posts: 1,943
3rd gear in a 3 speed is 1:1 and 4th gear in a 4 spd is 1:1, so either one will work. It just depends on where you want to shift, on the column or on the floor. You could always put the 3 speed shifter on the floor too.
__________________
RJD

1984 Chevrolet C30 welding truck 454/SM465
1977 GMC C15 pickup 350/TH350
1970 Chevrolet C20 pickup 350/TH400
1970 Chevrolet K20 Suburban 454/TH350
1969 GMC 8500 478M V6/5 spd winch truck
Robert1970C20rstbukt is offline   Reply With Quote
Old 01-01-2005, 03:51 AM   #4
68w/sbc406
Got Light Emitting Diode?
 
68w/sbc406's Avatar
 
Join Date: Apr 2004
Location: Newberg, OR
Posts: 2,485
go with the 4 speed, they are funner (yes its a word)
__________________
1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags

'02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's(the family car)

1993 Cherokee work ride/weekend wheeler
68w/sbc406 is offline   Reply With Quote
Old 01-01-2005, 04:43 AM   #5
Radke
Registered User
 
Join Date: Apr 2004
Location: Seward Ne.
Posts: 50
Brings up another question does any one have a 3 speed OD tranny like the ones that were in 57 chevys with the cable for the OD.
Radke is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:50 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com