T-20 Transmission
The T-20 has been used in many AATV,s for over 30 years
Many thousands have served us well, however with time, they along with all
mechanical parts will need repair.

See the TIPS on bottom of this page for more information on repair and modifications.

T-20 GENERAL REPAIR MANUAL
(permission granted from Skid Steer Corp to post this manual)
Gereral Operating
T-20 main view
Shifting section
Parts listing
Parts Group
Photos-Shifting group
Disassembly Click HERE for much better guide
Assembly Click HERE for much better guide
Adjustments ( for a better step-by-step
guide clicck HERE )

TIPS on care and modification of the T-20 Trans
T-20
Adjuster
Tools

 We now have available the special tools required to adjust the T-20 trans. click HERE
T-20
Adjustment
A step by step guide to adjust the bands in a T-20 Click HERE
T-20
MAIN SHAFT
 Contrary to what many people think, there are many different styles and versions of the Borg Warner T-20
transmissions. These were used in many different brands of ATVs: Including but not limited to the MAX, ATTEX, CAMEL, HUSTLER, SEARS, SWAMP FOX ,CHAPARRAL along with others. It is an excellent design that will give many years of dependable service.

One difference between various T-20's is in the main shaft design. Some are supported on the left side and
some are not. The supported version can be added to the newer unsupported design, by updating the main
shaft along with the outer sprocket shaft including the bearing for support. See PHOTO for details.
This modification can stop the problem of the main shaft snapping in half! Upon repair or service of your T-20. One should consider updating their T-20, if you have the newer unsupported style.
I have the parts in stock to update or just to repair as original. Contact me for details: Richard Clark
812-944-1643 Noon-6pm EST Weekdays or by email.
T-20
PLUNGER
O-RINGS
WARNING
The Borg Warner T-20 Transmission has been used in thousands of All Terrain Vehicles, including models of the ATTEX, HUSTLER, MAX, CAMEL, STARCRAFT and many others. Even in some commercial equipment like the HUSTLER WINGIT OFFSET SPRAYER. Many of these T-20's have been in operation since 1969! This Transmission is a wonderful piece of modern engineering. A new or properly rebuilt T-20 will give many years of service. However as with all mechanical items, things do need to be replaced with time.
In the past year I have seen a ever increasing number of T-20's come to me for repair with major drum and bearing damage. Almost 100% of this damage is being caused by running the T-20 without the proper level of Automatic Transmission Fluid. WHY? Since many of these T-20's are decades old the real problem is easy to find: PLUNGER SEALS. These seals are nothing than special O-rings that are installed on the four plungers, there are either one or two of these O-rings on each plunger. With the passing of time, these O-ring begin to leak the ATF out slowly. If the owners do not keep the inside of the machine clean, one may not even notice it. These O-rings are very cheap, however: when the transmission is used without proper lubrication the bands soon loose their linings and start the metal to metal wearing on the drums, which in turn send metal
particles through out the whole T-20 destroying all the bearings. What all this adds up to is that instead of a 20$ parts bill for gaskets and these O-rings you will have many hundreds of dollars to spend to fix the T-20. The drums are priced at an average of 150$ each and there are 4 of them!

What all this adds up to is: BE SURE TO KEEP AN EYE ON THE FLUID LEVEL INSIDE YOUR T-20. I recommend changing these O-rings every ten years. I have available ALL rebuild or repair parts for most T-20's Just check out the PARTS FOR ATV'S section within this ROUTE6x6 web site.

Thanks
Richard Clark
ROUTE6x6
RICHARD'S RELICS
812-944-1643 Noon-6pm EST Weekdays or by email.
T-20
PLUNGER
UPDATE
 After reading the above section I hope everyone understands how important the plunger O-rings are
With this in mind I am proud to offer updated PLUNGERS which already have the two groves for twin O-rings These two groves are installed in the correct locations on the plungers so they do not push inside or come outside the T-20 main case. Note there are four plungers used in the T-20, one for each band. However it is the bottom two with are leak prone (with age) Therefore these plungers are sold in pairs at very attractive prices

Contact:
Richard Clark, ROUTE6x6 and RICHARD'S RELICS
812-944-1643 Noon-6pm EST Weekdays or by email.
T-20
DRUMS
and
BANDS

The Borg Warner T-20 Transmission has been used in thousands of All Terrain Vehicles, including models of the ATTEX, HUSTLER, MAX, CAMEL, STARCRAFT and many others. Even in some commercial equipment like the HUSTLER WINGIT OFFSET SPRAYER. Many of these T-20 have been in operation since 1969! This Transmission is a wonderful piece of modern engineering. A new or properly rebuilt T-20 will give many years of service. However as with all mechanical items, things do need to be replaced with time. Upon passing of time and usage T-20 bands may become worn, replacement is straightforward, however: One must inspect condition of the drums. NEVER install new bands over worn, grooved, or damaged drums. If you do install new bands on bad drums then the old drums will just wear the new bands in no time. ANY DRUM THAT IS DAMAGED ON THE BAND SURFACE MUST BE REPLACED OR SLIGHTLY "TURNED DOWN" AT A MACHINE SHOP; We now offer new T-20 bands in oversizes, these are 100% new bands, not relined old bands. We offer new and used drums. Email me for details or visit my ATV PARTS website.

Click HERE to go to new T-20 bands page.

Click HERE to go to oversize T-20 band page.

NOTE: The band running surface of the drums should be smooth, like a brake drum, but not polished. Upon inspection of these drums be sure to also check the bearing to case surface and the gear ring machining of the "ring drum" You are welcome to call me on the phone for additional information.

Richard Clark
ROUTE6x6
RICHARD'S RELICS
812-944-1643 Noon- 6pm EST Weekdays or by email.
T-20
REBUILD
GUIDES
 See our step-by step repair guide for the T-20
We have one guide for disassembly and another guide for correct assembly
Click HERE for the guide page, (see Transmission section )
T-20
FLUID
 Clcik HERE to go to guide about what fluid to use in a T-20 and how
to check the fluids level.