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Welcome to the 3500HD.com forum created October 2009

Recent Posts

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11
Engine-Driveline-Wheels-Tires / Re: What 19.5 tire pressure do you run with
« Last post by someotherguy on May 28, 2019, 10:46:03 AM »
:( sorry I haven't responded yet but I wanted to see if people that are still driving HD's answered first.  I *wish* I was still in a nice 3500HD but that's not my current situation; driving a F-word F550SD that is beating the crap out of me every single night.

In the unlikely event I was driving an HD unloaded/loaded light, I'd probably run about 75-80psi.  Any less and I'd worry about the tires getting unnecessarily hot, or contributing to bad handling from sway.  Considering that in my line of work the HD would stay "loaded" frequently, I'd just keep 85-90 in them full-time.  That's also max inflation for the dolly tires used in wrecker work, so it makes it easy to remember to keep them all at the same pressure. :)

Richard
12
Engine-Driveline-Wheels-Tires / What 19.5 tire pressure do you run with
« Last post by ED-NY on May 14, 2019, 06:44:45 AM »
RE: 19.5 tires

What tire pressure do you guys run with for non heavy load trips?
13
Cool, also it’s best to identify your differentials carrier break before purchasing a set of gears.
14
https://eastcoastgearsupply.com/c-284525-gears-install-kits-carriers-spider-gears-dana-spicer-gears-dana-80-d80-dana-80-ring-and-pinions.html

I like this site a lot. Easy to use and lots of info. I believe GM Dana 80s have 11.25” 37 spline rears. Always best to verify first and once you select a gear on this site it will specify those specs

Thanks..they have the best prices that I have seen. Noted their link below.
15
https://eastcoastgearsupply.com/c-284525-gears-install-kits-carriers-spider-gears-dana-spicer-gears-dana-80-d80-dana-80-ring-and-pinions.html

I like this site a lot. Easy to use and lots of info. I believe GM Dana 80s have 11.25” 37 spline rears. Always best to verify first and once you select a gear on this site it will specify those specs
16
Engine-Driveline-Wheels-Tires / Anyone actually located gears for a 11" Dana 80
« Last post by ED-NY on May 09, 2019, 10:17:09 AM »
RE: 1995 3500HD

Anyone actually locate ring/pinion gears other than 5.13 & 4.63 for a Dana Spicer 80?
17
Forum Help - Suggestions / DRAC programming for 1994 3500HD speedometer
« Last post by ED-NY on May 06, 2019, 11:38:56 PM »
Anyone calibrate a DRAC (VSSB) for a 1994 Chevy 3500HD with 4.63 rear axle, 225/70R19.5 tires? 

The input ratio would be greater than 0.988770 and most reference sites don't have pin positions beyond that number.

http://tbichips.com/?page_id=504
18
Tech - Help Area / Re: Part number rear pinion seal? 1995 3500HD Spicer 80?
« Last post by ED-NY on May 03, 2019, 06:46:53 AM »
Thanks...ordered the parts online from Advance...the good news is that I finally will know exactly which gear ratio it has once the cover is removed.  Need to calibrate the DRAC so the speedometer is accurate.
19
Tech - Help Area / Re: Part number rear pinion seal? 1995 3500HD Spicer 80?
« Last post by RPF207 on May 02, 2019, 11:00:58 PM »
Yeah, Dana/spicer 80 11.25” ring gear with 10 bolt cover. Gm Dana 80 built different from other Dana 80s I believe an extra two splines with the larger diameter shaft. Parts may not interchange. Was always told that 75w140 was for constant heavy towing, the 140 was meant for the heat. For normal use with occasional towing 75w90. Although these trucks might have come with 75w140 originally.
20
Tech - Help Area / Re: Part number rear pinion seal? 1995 3500HD Spicer 80?
« Last post by ED-NY on May 02, 2019, 05:36:44 PM »
Looks like I located the part numbers:

Pinion Seal 4525V (Viton)  11" Spicer 80
Diff Cover gasket RDS-55447 (Felpro)
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