carriers
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Junior User
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carriers
hi all. i have a 1990 f150 auto with 3.55 gears. im running 35 in tires and am thinking of going to 4.10 or 4.56 . do i have to replace both front and rear carriers? i have the 8.8 in rear and the d44 up front.thanks.
Postmaster
Joined: Oct 2006
Posts: 4,816
Likes: 1
From: Davis & Newcastle, CA
You only need to replace the front carrier when crossing the gear threshold around 3.73, the rear carrier should be reusable as long as you (or the tech) don't break it when you (they) remove it... Like they did with mine 
Posting Guru
Joined: Jan 2006
Posts: 1,263
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From: The dark carnival
Originally Posted by trackenator
hi all. i have a 1990 f150 auto with 3.55 gears. im running 35 in tires and am thinking of going to 4.10 or 4.56 . do i have to replace both front and rear carriers? i have the 8.8 in rear and the d44 up front.thanks.
Carpenter Local 745
Joined: Apr 2006
Posts: 5,794
Likes: 11
From: on da beach
If you have open diffs now and do some off pavement runs, you might as well change the carriers to traction devices while it is opened up ( and if you have the money to do so).
I looked at a catalog and there are different carriers for the D44
(traction devices) - 3.00 - 3.73 true trac DET913A334
3.92 - 5.38 true trac DET913A333
This is not the final word on carriers - just some insight - I know some carriers have to be changed because the pinion is too small meet up with the ring. May not be the case for open diffs.
Knowing what your diff requires in VERY good knowledge, Letting the shop know that you know what you are talking about, lets them know you know your stuff. Make sense?
4.56 sounds right - what engine?
I looked at a catalog and there are different carriers for the D44
(traction devices) - 3.00 - 3.73 true trac DET913A334
3.92 - 5.38 true trac DET913A333
This is not the final word on carriers - just some insight - I know some carriers have to be changed because the pinion is too small meet up with the ring. May not be the case for open diffs.
Knowing what your diff requires in VERY good knowledge, Letting the shop know that you know what you are talking about, lets them know you know your stuff. Make sense?
4.56 sounds right - what engine?
