Rear end differential
Thread Starter
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New User
Joined: Jan 2002
Posts: 7
Likes: 0
Rear end differential
Hi all,
Have an 88 F150 351W, have done some modifications such as a OD trans. Need a rear end 373 with posi track. Know where i can find one?? Also, is there a big difference between 373 and 355 gears. Can I towe a 16ft bass boat in od with 355 gears??
Thanks
Have an 88 F150 351W, have done some modifications such as a OD trans. Need a rear end 373 with posi track. Know where i can find one?? Also, is there a big difference between 373 and 355 gears. Can I towe a 16ft bass boat in od with 355 gears??
Thanks
Postmaster
Joined: Jun 1999
Posts: 2,719
Likes: 1
From: Lee's Summit MO
Rear end differential
Really if your gonna pull that much boat and still want OD, you should seriously consider 4:10 gears. 3:73 gears were not available with the 8.8" axle from the factory. However you can get aftermarket gears. Basically, as you may know, the lower the gears the more rpm and towing power you will have.
'93 F-150 loaded and modified!
http://briefcase.yahoo.com/toydestroyer1
Elder User
Joined: May 2001
Posts: 692
Likes: 1
From: Coon Rapids, MN
Rear end differential
I know people are constantly preaching not to use OD while towing. It is a little weaker and causes the engine to bog under load. However, as long as your engine is not constantly searching between gears and is turning decent RPM it is ok. A 16' bass boat weights squat. You'll just have to try it out and see what happens. If you live in hilly terrain it would probably be best to not us OD but if the road is relatively flat it will be no problem.
Thread Starter
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New User
Joined: Jan 2002
Posts: 7
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Rear end differential
QK guys thanks for the info, will go with 3.73 gears and lock trac,can't find one like that so ill have to rebuild my old one.
Hey is Msd ignition good I was told it didn't do much to help on Fords??
Hey is Msd ignition good I was told it didn't do much to help on Fords??
Senior User
Joined: Aug 2000
Posts: 166
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Rear end differential
I put the MSD in my truck (95 5.0), I gained maybe 1 mpg and didn't notice any real power gain, even when I changed to wider gaped plugs. I figure it's been in there for a year, if I gained 1 mpg the thing has probably paid for itself by now.
