Thank God - 2025 is Over !
​​​
My Plans for 2026 is going in a different direction. Since the assault on Dec.5th, I've had to re-think my future plans and especially the work I do. I find that it's getting harder to lift a AAM 11.5 Carrier ,( 90 lb. ) and install into a 1 ton truck on the lift. Since I'm only 74, I need to make every moment count. I can lengthen my days or shorten them. It's up to me.
​
​
Differential Man's Products LLC
1080 Valley Street, Suite A
Colorado Springs, CO 80915
The Differential Man Shop
Office: 719-424-0050
UPDATE NOTICE
1-18-2026
Shop Days Tues-Sat
​
Getting ready to Retire
2026
I Don't build by the Book !
​
For Years, I've been saying, " I don't build by the book, I build to last"! Through out my 50 years of "Turning Wrenches", I noticed a change in the factory's assembling of differentials. Especially in the last 5 years, I found that the pinion bearings and carrier bearings were wearing prematurely, yet outside of the vehicles warranty. For pinion noise or being loose, I would remove the driveshaft and spin the yoke. On some, I had to use both hands to turn the pinion. On differentials that used threaded adjusters for the carrier bearings, I had to used a breaker bar to break it loose. On differentials using carrier spacer shims, I couldn't get the same shims back in.
As for parts, there are certain brands I use and some I will not. I use to let customers bring their own parts, but now I tell them what parts to purchase. There are brands that I have to fight with to get a good pattern. I always say, "You get what you pay for". Sometimes I'll guide them on the internet on how to find those "Hard to find Parts".
In order to build a great differential, I always ask the customer what they are using their vehicle for. Drag Racing, Track Racing, Off-Road 4-wheeling ( trailered or driving to ) and Heavy Hauling, It makes a difference on the Ring & Pinion set-up. and Bearing-Preloads.
Every differential needs to be checked for straightness, especially here in Colorado. In order for all the parts to work together and last, they have to be in alignment. Sometimes I can straighten with heating & cooling and others I use a press.
When the customer picks up their vehicle or differential, I talk to them about maintenance. I explain to them that you can't go by millage, You have to go by color and condition of oil. I always say, the oil will talk to you if you just look at it. I guess I'm a maintenance Freak! Remember the old Franz Oil Commercial. They always said, "Pay me now or Pay me later". I always say, "Oil is cheaper than Parts". To make it easier for the customer, I'll drill & tap the housing for a Drain Plug.