Rear end swap
Thread Starter
|
Freshman User
Joined: Feb 2004
Posts: 42
Likes: 0
From: Sumter SC
Rear end swap
I have a 88 302 5spd with a 355 rear gear and was thinking of swapping to a 308. Has anybody done this ? Is there any specific year 8.8 to avoid? Is the truck 8.8 unique? OR will a mustang one swap in? Thanks in advance
Steve
Steve
Fleet Mechanic
Joined: Nov 2003
Posts: 1,372
Likes: 14
From: West Cornwall, CT
A 355 rear end is about standard for an F-150 with a 302 engine (many folk would prefer 411s). You might not be pleased with performance after going to 308 gearing since the 302 does not make lots of torque at low speeds.
Changing tire diameter is an easy way to get the same effect as changing rear end gears. Might be worth thinking about.
Lou Braun
Changing tire diameter is an easy way to get the same effect as changing rear end gears. Might be worth thinking about.
Lou Braun
Thread Starter
|
Freshman User
Joined: Feb 2004
Posts: 42
Likes: 0
From: Sumter SC
Thanks for the info may have to rethink this it was not really a gas millage idea it was more that it seems to be screeming at 60 mph (2100 rpm). It also seems like I have to shift early (going into 5th at 45) but maybe I am not just used to it. ( I just traded an 81 chevy 350 auto for this truck)
Thanks
Steve
Thanks
Steve
Thread Starter
|
Freshman User
Joined: Feb 2004
Posts: 42
Likes: 0
From: Sumter SC
I shift around 2000 and I know that is not high just sounds like it could just be the exhaust.
Steve
Steve
Trending Topics
Thread Starter
|
Freshman User
Joined: Feb 2004
Posts: 42
Likes: 0
From: Sumter SC
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Cargo Master
Joined: Dec 2003
Posts: 2,735
Likes: 38
From: Sunny Florida
I have larger tires on my 89 with a C6 and 3.55 gears and I run close to 3k on the tach will driving around 70mph. Thats screaming to me. I plan on installing a ZF this spring to bring the rpm's down and hopefullt imptove my mileage.
Senior User
Joined: Jan 2004
Posts: 324
Likes: 0
From: Southern USA
a 302 isn't screaming at 2grand. has any of the factory intake been modified/altered? intake noise can be a problem, as well as other engine/body or some resonance at certain rpm's. my '91 w/e4od is just hitting the 2k mark at 70 mph! very quiet, but of course it's in overdrive, but also have 355 rear. hows your fan clutch? i would strongly recomend checking other sources of noise before tearing into the rear end. that's an expensive job unless you've done it before & want to tackle it. my 2cents worth...pross
Posting Guru
Joined: Dec 1999
Posts: 1,903
Likes: 2
From: Copley, OH
Originally posted by Maineiac
ZF is a different ratio than a m505?
ZF is a different ratio than a m505?