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What's the difference between the cat and the procat

procat body ....obvius...

new rear end
new rear diff gone is the 3rd diff in the spur and integrator for a more standard solution they call it a drumdiff.

7 slot saddlepack chassi instead of the stickpack

some one else can surely tell more but thats what i could think of now.

mvh Isobarik

There are also a load of differences between the original CAT, CAT XL and XLS.

Original CAT
Short wheelbase
Rear differential built into layshaft, like the RC10 6 gear gearbox
Integrator unit where the rear diff should be, to adjust drive to front
Solid front pulley with one ways built into driveshafts
Stick pack battery mounting

Changes between CAT and XL
Long wheelbase
New bumper

Changes between XL and XLS
Front ball diff
Wider front and rear suspension using spacers and new rear fibreglass upper brace
New front shock mounts giving greater castor angle and kick up for front suspension

Changes between XLS and Procat.
New front bumper
New front gearbox moulding with built in belt tensioner
New front diff pulley that holds 14 balls instead of 9 balls
New wider saddle pack chassis
New fixed layshaft with new spur gear held on with o-ring. XLS layshaft contained rear ball diff
New rear diff to replace front drive integrator
New moulded plastic shock tower and wing mount
New rear suspension taken from the Topcat/Cougar