gears
Mountain Pass
Joined: Jan 2009
Posts: 174
Likes: 2
I got 3.73s with 33s and run about 2200 rpm at 70. I got used SD gears. The rear set I got off eBay and the front set from a junk yard I found on Car-Part.com. If you get OEM 10.5 gears, you need to use an inner pinion bearing for a 10.5.
Rusty
Fleet Mechanic
Joined: Jan 2011
Posts: 1,793
Likes: 74
From: Richland, WA
For your 3.73s, if you plan to get master install kits, get one for a Ford/Sterling 10.5 gearset. The only difference between the 10.25 and 10.5 is the inner pinion bearing which has to match the gearset. If you get a 10.5 master install kit, your good to go. If you plan to reuse your bearings, you'll need an inner pinion bearing and race for a 10.5.
The newer D60s use a crush sleeve to set pinion preload instead of shims like the OBS D60s. So, you'll need a new one of those for both the front and rear. A mater install kit will come with both a crush sleeve and shims.
Mountain Pass
Joined: Jan 2009
Posts: 174
Likes: 2
Well, my rear tires are pretty bald, so they're probably only like 28 or 29". Which makes sense. If they were truly 32.8 (285/75), I should be rolling 2032 rpm at 70. I'm waiting for a good tire sale then I'll probably get some 35s.
For your 3.73s, if you plan to get master install kits, get one for a Ford/Sterling 10.5 gearset. The only difference between the 10.25 and 10.5 is the inner pinion bearing which has to match the gearset. If you get a 10.5 master install kit, your good to go. If you plan to reuse your bearings, you'll need an inner pinion bearing and race for a 10.5.
The newer D60s use a crush sleeve to set pinion preload instead of shims like the OBS D60s. So, you'll need a new one of those for both the front and rear. A mater install kit will come with both a crush sleeve and shims.
For your 3.73s, if you plan to get master install kits, get one for a Ford/Sterling 10.5 gearset. The only difference between the 10.25 and 10.5 is the inner pinion bearing which has to match the gearset. If you get a 10.5 master install kit, your good to go. If you plan to reuse your bearings, you'll need an inner pinion bearing and race for a 10.5.
The newer D60s use a crush sleeve to set pinion preload instead of shims like the OBS D60s. So, you'll need a new one of those for both the front and rear. A mater install kit will come with both a crush sleeve and shims.
Thanks again!
Rusty
Fleet Mechanic
Joined: Jan 2011
Posts: 1,793
Likes: 74
From: Richland, WA
Awesome information. Thank you! I have the 3.73's out of a 2004 Superduty, so the crush sleeve is vital info. I take it you installed the later Dana 60 3.73's in your Dana 60? With the low miles on mine, and the visual condition of the bearings, I wonder if new seals and the crush sleeve will do for the Dana 60? The 10.25 will get a full rebuild.
Thanks again!
Rusty
Thanks again!
Rusty
Mountain Pass
Joined: Jan 2009
Posts: 174
Likes: 2
Thanks, again.
Rusty
Mountain Pass
Joined: Jan 2009
Posts: 174
Likes: 2
Well, my rear tires are pretty bald, so they're probably only like 28 or 29". Which makes sense. If they were truly 32.8 (285/75), I should be rolling 2032 rpm at 70. I'm waiting for a good tire sale then I'll probably get some 35s.
For your 3.73s, if you plan to get master install kits, get one for a Ford/Sterling 10.5 gearset. The only difference between the 10.25 and 10.5 is the inner pinion bearing which has to match the gearset. If you get a 10.5 master install kit, your good to go. If you plan to reuse your bearings, you'll need an inner pinion bearing and race for a 10.5.
The newer D60s use a crush sleeve to set pinion preload instead of shims like the OBS D60s. So, you'll need a new one of those for both the front and rear. A mater install kit will come with both a crush sleeve and shims.
For your 3.73s, if you plan to get master install kits, get one for a Ford/Sterling 10.5 gearset. The only difference between the 10.25 and 10.5 is the inner pinion bearing which has to match the gearset. If you get a 10.5 master install kit, your good to go. If you plan to reuse your bearings, you'll need an inner pinion bearing and race for a 10.5.
The newer D60s use a crush sleeve to set pinion preload instead of shims like the OBS D60s. So, you'll need a new one of those for both the front and rear. A mater install kit will come with both a crush sleeve and shims.
Thanks.
Rusty
Fleet Mechanic
Joined: Jan 2011
Posts: 1,793
Likes: 74
From: Richland, WA
No, I didn't have any issues with the pinion nut.
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Cargo Master
Joined: May 2011
Posts: 2,623
Likes: 0
From: Rockford IL
Something Im kind of curious is all of you guys have had your PCM's set to the correct tire size? I just am curious. I know very little about gearing and this thread is very helpful.
Cuz I believe I have 4.10s... Ive got 35s and my pcm hasnt been flashed for them. So when my speedometer is readin about 66.. my GPS is saying 70. and my tacht is right about 21-2200 its kinda tough to read. It sticks so when I am cruising I have to tap the dash to get it to set right. lol
Cuz I believe I have 4.10s... Ive got 35s and my pcm hasnt been flashed for them. So when my speedometer is readin about 66.. my GPS is saying 70. and my tacht is right about 21-2200 its kinda tough to read. It sticks so when I am cruising I have to tap the dash to get it to set right. lol
Fleet Mechanic
Joined: Jan 2011
Posts: 1,793
Likes: 74
From: Richland, WA
You need to recalibrate your PSOM, not the PCM. Just follow the instructions here: PSOM Calibration. I just put on some 315/75/R16's and recalibrated my PSOM last week. It appears to be right on the money now. I haven't had a chance to test it though.
FYI... Gear changes won't affect your spedo, just tire different tire sizes.
FYI... Gear changes won't affect your spedo, just tire different tire sizes.
Senior User
Joined: Oct 2011
Posts: 108
Likes: 0
There seems to be some confusing statements in this gear discussion. I too am researching gears.
The Gears Vendor overdrive mentioned here is not a ring and pinion gearset.? The overdrive is an electronically controlled extra transfer case that bolts directly to the tailhousing of your transmission. If I understand it correctly.
I think I agree with the statement that 4.10 gears with 37's sounds about right from what I've seen. I run 2100 rpms @ 70mph everything stock. I think your nuumbers sound right if your programming reflects your tire size. Like someone else said the speedo signals from the rearend trigger ring. This signal iis unchanged byy gearsets the ring stays the same. This is different than those vehicles which signal speed & MILES through the transmission.
I also agree I wouldn't go higher than would put you running lower than 3.55 combined tire and gear combo. You don't need more reasons for you tranny to go out.
I would very much like to put the gear vendor set up in mine...but my tranny and current 4x4 transfer case is already like 12ft long assembled. Another added length to this setup would suck taking in and out in one piece.
The Gears Vendor overdrive mentioned here is not a ring and pinion gearset.? The overdrive is an electronically controlled extra transfer case that bolts directly to the tailhousing of your transmission. If I understand it correctly.
I think I agree with the statement that 4.10 gears with 37's sounds about right from what I've seen. I run 2100 rpms @ 70mph everything stock. I think your nuumbers sound right if your programming reflects your tire size. Like someone else said the speedo signals from the rearend trigger ring. This signal iis unchanged byy gearsets the ring stays the same. This is different than those vehicles which signal speed & MILES through the transmission.
I also agree I wouldn't go higher than would put you running lower than 3.55 combined tire and gear combo. You don't need more reasons for you tranny to go out.
I would very much like to put the gear vendor set up in mine...but my tranny and current 4x4 transfer case is already like 12ft long assembled. Another added length to this setup would suck taking in and out in one piece.
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