4.11 ratio Timken?
5th Wheeling
Joined: Feb 2023
Posts: 29
Likes: 7
Hi Stu , wondering if you know what is involved in swapping the ring and pinion? i read in one of these forms that you have done that to your F3' maybe , Chuck said he has 5.14 and 5.67 ratio for the f5 and i wondered what that would really take ? we are pretty mechanically inclined , but we dont have any big press or anything of that nature so wondering if thats something that you did your self or is there a machine shop you like ( i think your in IL ? ) he also said he thinks we will need to swap down the f3 ratio . i know the f5 has the 666 ratio , the f3 has the nicer t87 gear box , but is the only way to tell to spin the drive shaft and count the revolutions ? or is it stamped anywhere on the case ? thanks for the advice
wes
wes
Marmon-Herrington Man
Joined: Jul 2005
Posts: 11,986
Likes: 446
From: Central Illinois
I have no hands on experience with this. Chuck swapped the 4.86/1 for the 4.11/1 sets in my axles. I’d suggest talking to Chuck if you want to do this yourself. I know he sells the sets for guys to do it themselves or have it done locally. There should be cog numbers stamped on the case of the axle. I don’t recall the numbers, I’m sorry. Stu
Cargo Master
Joined: Jan 2004
Posts: 2,202
Likes: 354
From: Mandan, ND
The Timken on the F3 has the ring gear tooth count and the pinion tooth count stamped on the larger part of the differential. It looks like a fraction. Divide the large by the small and you will have your ratio. I have an F3 AWD like Stu’s. I have completely dissembled the front end, save the differential carrier, no need to dive into that. Anywho, the pinion came out with a homemade puller and a little heat from a large propane torch. The manual says to use a press to insert the assembled pinion/bearings into the housing.
The original ring gear is riveted on, I believe the replacement is bolted on. I’m not swapping ratios, so I don’t know more than that.
if you decide to do it yourself, get a manual, and instructions from Chuck. I have read accounts on fte from folks who have done it themselves, iirc.
The original ring gear is riveted on, I believe the replacement is bolted on. I’m not swapping ratios, so I don’t know more than that.
if you decide to do it yourself, get a manual, and instructions from Chuck. I have read accounts on fte from folks who have done it themselves, iirc.
Parts Nerd Extraordinaire
Joined: Sep 2010
Posts: 4,396
Likes: 1,801
From: Western NY
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