Ford Powerstroke
5R110 · 6R140 · 10R140 TorqShift
Known weak point
Valve-body and torque-converter wear from years of heavy towing.
Our fix
We rebuild stronger than stock and improve heat management.
Heavy Duty & Diesel
Heavy Duty Truck Transmission Repair in Kern County
Powerstroke, Cummins, and Duramax specialists. When a work truck is down it's not earning, so we build them back stronger and get them back fast.
Since 1956
Powerstroke · Cummins · Duramax
Free towing
Fleet priority
Diesel specialists
Diesel transmissions aren't like standard automatics.
Diesel trucks work hard, tow heavy, and put enormous stress on their transmissions. The torque of a Powerstroke, Cummins, or Duramax demands specialized knowledge and heavy-duty parts. After years of towing and high mileage, even the toughest units develop problems, and we've seen them all.
Diesel platforms
Powerstroke, Cummins, and Duramax, built back stronger.
Diesel torque is brutal on a transmission, and each platform fails in its own known way. We know the weak points and how to fix them.
Ram Cummins
68RFE · Aisin AS69RC
Known weak point
The 68RFE is under-built for the Cummins' torque; the overdrive clutch struggles under load.
Our fix
We upgrade the components and converter so it holds the tow it was sold for.
GM Duramax
Allison 1000
Known weak point
Hard towing brings converter shudder, overheating, and valve-body wear.
Our fix
In a rebuild we upgrade the weak points and improve cooling.
Know your truck
Which transmission is in your HD truck?
Pick your make and model. We'll tell you the exact unit it runs and what we see go wrong with it, because these are the trucks that fill our bays.
Step 1 — Pick your make
Transmission readout
Pick your make and model, and we'll show you the transmission it runs, and what we see go wrong with it.
What it actually pulls
The load is the whole problem.
A heavy-duty transmission rarely fails because of the miles. It fails because of what was behind it for those miles.
Fifth-wheel up a grade in summer, a loaded gooseneck on dirt, a service body that never runs empty. That is heat, and heat is what takes out a converter and cooks a clutch pack. We build for the way the truck is actually used, not the way the brochure describes it.
Diagnostic board
Common diesel transmission problems we fix
Heavy towing and hard work take their toll. The problems we see most in diesel units:
01
Slipping and shuddering under load
Worn clutches or a failing torque converter.
02
Harsh or delayed shifts
Valve-body wear struggling to regulate fluid pressure.
03
Overheating
Cooked fluid from towing heavy in the heat.
04
No forward or reverse
Internal component failure.
A diesel that's down is a diesel that's not earning. Get it looked at fast.
Performance
Built to tow, tuned to last.
Towing more, tuned for more power, or just want it to last? We build diesel transmissions with upgraded components, better heat management, and increased holding capacity, matched to how you actually use your truck. We prioritize fast turnaround because your work truck needs to get back to work, and free towing is included on major repairs.
You're covered
We stand behind every repair.
When you trust us with your transmission, you're protected. We've stood behind our work for three generations, and every repair is backed by our warranty.
Honored at all 5 Kern County locations
Multiple coverage levels available
One family-owned company since 1956
See a location for full details
Frequently asked questions
Common questions about diesel and performance transmission work.
Yes, Powerstroke, Cummins, and Duramax units are a core specialty. We understand the heavy-duty demands diesel places on a transmission.
Financing available
Don't put off a repair you can pay for over time.
A transmission problem rarely waits for a good month. Apply online in minutes and find out what you qualify for before you commit to the repair.
Apply online in minutes, before you commit to the repair
Use it for a rebuild, a replacement or general auto repair
Free diagnostic first, so you know the real number
Honored at all five Kern County locations
Easy Financing Options
Apply online in minutes. Find out what you qualify for before you commit.
A Snap Finance Solution
Approvals range from $300 - $5,000. Bank partner issues installment loans. Merchant partner issues retail installment contracts. More details at snapfinance.com/legal/financing-options
Tell us what you're driving. We'll take it from there.
Book your free diagnostic in under a minute. Only your name and phone are required, and the slot is yours as soon as you submit.
01Vehicle
02Service
03Location
Free diagnostic, no obligation. Warranty honored at all 5 locations.