| |
Click on image for the lowdown. 
====
| | |
7 members (32Fordpuchoptop, 3B, TUTS 59, Shardean, msmall, carbking, Bill Hanlon),
51
guests, and
3
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,030 Posts1,055,430 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!
| | 
#55167 01/18/2006 1:22 AM | Joined: Sep 2005 Posts: 67 Member | | Member Joined: Sep 2005 Posts: 67 | can anybody tell me anything about a 308 differential? and what engs would be a good match to one
TIA | | |
#55168 01/18/2006 6:43 AM | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | I have a 3.08 in my '55 1st Suburban with a GMC 270 and an SM420. It works real well as a daily driver, but pulling a trailer with it does not work as well as I'd like.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | |
#55169 01/18/2006 8:49 AM | Joined: Apr 2005 Posts: 926 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 926 | I have one in my '57 GMC half ton with a '68 Pontiac 400,and it works great. I also run 31" tall 16's on it. Might be right on the edge of too tall gears for any kind of work with a six,but the big Pontiac has pulled my 35 foot RV trailer just fine,even on hills. Remember,if you end up with too much gearing or too little power,you can adjust that a little with your tire sizes(diameters). I also noticed going from a 4.10 to a 3.08 gave me about 4 more miles per gallon,average.
Speed | | |
#55170 01/18/2006 2:28 PM | Joined: Dec 2003 Posts: 1,554 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 1,554 | You are forgetting one important thing,the tranny.If you use a regular 3 or 4 sp.tranny it should work just fine.However if you plan to use an Overdrive tranny,it will not work out well.with an Od trans.you will need a 3:73,or 3;90 rear. | | |
#55171 01/19/2006 4:26 AM | Joined: Sep 2005 Posts: 67 Member | | Member Joined: Sep 2005 Posts: 67 | Thanks guys I was told by the po that he put a 308 behind a 400 sb and it appears to be a 420 tranny from what I can tell...I know it has a granny gear and I was thinking about some taller tires... I have boats to pull but here in Florida it's mostly flat except for a few parts of cent & panhandle...I know you western guys are snickering...  at any rate I have had to take the po's word for most of what is in this truck but it does seem to run good... he told me it was a 400 but not if it was a chev or pontiac and I haven't been able to catch up w/him and ask...still haven't found #"s on the eng to tell for sure | | |
|
|
| |
