Franz and Grubb Engine
Triumph 4 speed gearbox rebuild kit 650 750
Regular price
$239.00
Shipping calculated at checkout.
Rebuilding a Triumph 4 speed gearbox may not be too hard, but getting all the correct parts together sometimes is . After rebuilding these gearboxes for years, I finally put together a kit of all the commonly replaced parts. This kit has everything you need to get your Triumph four speed gearbox back into shape.
The high gear bushing is a two piece design which is easier to install than the originals, but it must be honed or reamed to size after installation. The low gear bushing also needs to be sized after installation- this allows you to custom fit your bushings for an exact fit.
The Koyo needle bearings are made in USA (on the original tooling from Torrington).
Tab washers and oil seals are included, and this convenient and complete kit will also save you money as these components purchased separately would cost $300 or more at most online shops!
Included is a 32 page booklet with gear charts, instructions, and tips...also an 18 page booklet on changes from 1968-70 that details camplate and spring differences and more written by Mike James.
THIS 24 PIECE KIT INCLUDES:
57-0448 HIGH GEAR BEARING x1
60-3552 (S35-7) MAINSHAFT BEARING x1
57-1607 LAYSHAFT THRUST WASHER x2
57-1614 LAYSHAFT NEEDLE BEARING (open) x1
57-1606 LAYSHAFT NEEDLE BEARING (closed )x1
57-0412 GEARCHANGE SPINDLE BUSHING x1
57-0946 OIL SEAL 4 SPEED SPROCKET x1
57-2116 SPROCKET LOCKING WASHER x1
57-2240 MAINSHAFT LOCKING WASHER x1
57-3988 (PT108B) CLUTCH PUSHROD BUSHING x1
57-1370* (2 pc) HIGH GEAR BUSHING KPMI x1
* MUST BE SIZED AFTER INSTALLATION
57-0928* LOW GEAR BUSHING x1
* MUST BE SIZED AFTER INSTALLATION
57-0057 GEARCHANGE SPINDLE BUSHING x1
57-0023 KICKSTARTER SPINDLE BUSHING x1
70-3309 SHIFTER O RING x1
57-0404 QUADRANT RETURN SPRING x2
57-0405 SHIFT PLUNGER SPRING x2
57-1257 DRAIN PLUG WASHER x1
70-2441 DRAIN PLUG COPPER WASHER x1
QUADRANT SPINDLE SPLIT PIN x2
Don't waste all your time looking in parts books, spend it putting your transmission together with all new quality parts.
This kit is also great if putting a later Unit construction 4 speed gear cluster into a pre unit gearbox. The needle bearings will replace the bushings with no modification.
