HTS Logo

Top Quality Transmissions and Differentials
for the Heavy Duty Industry

(916) 395-1353 or
toll-free (800) 962-8782
6890 Luther Drive, Sacramento
CA, 95823 - Get Directions
Open Monday-Friday, 8-5pm -
Contact HTS
HTS headquarters at 6890 Luther Drive, Sacramento CA.
New differentials from the factory.
A Fuller shift cover, rebuilt and ready for action.
Our main work zone.
Here's Ed Bolla at the parts counter, and Don Hanson on the right.
Here's mechanic Bob Malsack at his work station!
Here's mechanic Jorge Aleman, at his work station.
Here's Gary Bates, our lead differential specialist.
Our Van Norman flywheel resurfacer.
A finished resurfaced flywheeel.
Two units ready for the shelf.
The pieces of a Mack transmission, ready to be assembled.
A customer's Chelsea PTO, ready for reassembly.
A rebuilt transmission, ready for pickup.
Miscellaneous new and used axle shafts.
The difference between a new and worn out fork.
The difference between a new and worn out fork.
Extreme heat due to lack of lubrication caused catastrophic failure of the auxillary section in an RTLO 18913A.
Extreme heat due to lack of lubrication caused catastrophic failure of the auxillary section in an RTLO 18913A.
Extreme heat due to lack of lubrication caused the teeth of this gear to melt.
Bearing failure, due to lack of lubricant.
Another victim of low oil level.
We service and sell FRO Series transmissions including the internal cooler style shown here.
Three of our rebuilt differentials.
A Namco PTO repair underway.
Bob Malsack positions a main case for repair.
The pre-boring process underway.
Bore positioning is checked from all angles.
The precise bore position is determined with a dial indicator.
The dial indicator making contact with the bore to be repaired.
Drilling anchor pin pilot hole.
Riveting anchor pin into place.
The finished product.
Pre-boring an auxillary countershaft bore in a main case.
Pre-boring an auxillary countershaft bore in a main case.
A finished 14613 countershaft bore.
A customer's differential suffered catastrophic pilot bearing failure. This CAN be repaired.
The forementioned repair has been made. This carrier is ready for reassembly.
This technique of "repairing" a bore is definitely not reccomended.
More "field repair" machinework.
The finished Chelsea PTO.
AT 1202 Auxillary transmission - In stock now!
An FRLO series Transmission.
An FRLO series Transmission.
Our initial inspection instantly revealed coolant contamination. Apparent "rusty water" appearance of transmission lubricant.
A leaking internal oil cooler resulted in a complete loss for this transmission.
The customer's original complaint started in this area. This transmission is a complete loss.
This transmission came in with a synchro complaint. He was surprised when we told him his whole transmission was ruined by an internal oil cooler failure.
This differential should not have been assembled. The thick layer of loctite indicates that it was in need of a hyatt bearing sleeve. You will not find this condition in an HTS unit!
This differential should not have been assembled. The thick layer of loctite indicates that it was in need of a hyatt bearing sleeve. You will not find this condition in an HTS unit!
The difference between a new and worn-out shift lever.
The difference between a new and worn-out shift lever. Think this didn't cause any problems? It did.
AT-1202. Rebuilt and ready to go.
Fabco TC-38 transfer case.
D46-170
Fabco Transfer Case TC-170.
A Fuller 2-Speed Auxillary.
A Meritor transfer case.
Shock load failure resulting in worst case scenario.
Taken in the early 1920's in Walnut Grove, CA. This truck is chain drive, with solid rubber tires on the trailer. It often made trips to San Fransisco, where at least one flat tire was always expected. It was hand-loaded with pears.
Taken in the early 1920's in Walnut Grove, CA. The truck on the left is a Fageol being built as a kit. The truck on the right is a Moreland. Don's grandfather, Leland O. Hanson is on the far right.