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#1400349 03/07/2021 9:18 AM
Joined: Jan 2020
Posts: 89
4
'Bolter
'Bolter
4 Offline
Joined: Jan 2020
Posts: 89
Hello Stovebolters. Im doing a gear swap on my 12 bolt truck rear-end. The rear came with stock 4.11 gears and im installing 3.73 gears. I've set the pinion depth with a flat piece of metal stock and dial calipers to what it is calling for witch is 2.824". Im having trouble reading the gear pattern can anyone help translate what I have here. Thank you.
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Screenshot_20210307-011534_Gallery.jpg (109.52 KB, 83 downloads)
Screenshot_20210307-011558_Gallery.jpg (132.57 KB, 83 downloads)

Joined: Feb 2000
Posts: 5,215
J
'Bolter
'Bolter
J Offline
Joined: Feb 2000
Posts: 5,215
It looks pretty good. Be sure when checking the pattern, that you hold the ring gear really tight while turning the pinion. You need to " load " the gears to get a good pattern. Double check in reverse also. I like to see the main contact point about 1/3 of the way up from the inside, under really hard load, the contact will be about centered on the teeth.

Joined: Jun 2004
Posts: 8,597
W
Riding in the Passing Lane
Riding in the Passing Lane
W Offline
Joined: Jun 2004
Posts: 8,597
It looks like a really good pattern to me.

George


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
In the Gallery Forum
Joined: Mar 2014
Posts: 4,489
J
Moderator, Electrical Bay
Moderator, Electrical Bay
J Offline
Joined: Mar 2014
Posts: 4,489
Looks fine to me.


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
Joined: Jan 2020
Posts: 89
4
'Bolter
'Bolter
4 Offline
Joined: Jan 2020
Posts: 89
Thanks guys. I didn’t put load on the ring gear when I took this pattern. I’ll try a again with a load on the ring gear this time. Hopefully it doesn’t change much.


Moderated by  Dusty53, SWEET 

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