Roven diff will not fit in turtle racing diff case

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Adam1234

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Anybody have any idea why the Roven diff will not fit in the turtle racing quick diff?
 

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The TR gearbox is made for the HPI Baja, the Rovan diffs are 1-2mm wider at the bearings, depending how slack their tolerances are on the day lol.
I believe King Motor diffs are ok though
That's just one of the reasons why they say 95% of HPI parts fit the clones

*edit* all brand name aftermarket upgrades are made to HPI specs, so due to the slack manufacturing tolerances of the clones, upgrades can be hit and miss, but as i mentioned, the Rovan diffs are wider regardless :)
 
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gavsta72 said:
The TR gearbox is made for the HPI Baja, the Rovan diffs are 1-2mm wider at the bearings, depending how slack their tolerances are on the day lol.
I believe King Motor diffs are ok though
That's just one of the reasons why they say 95% of HPI parts fit the clones

*edit* all brand name aftermarket upgrades are made to HPI specs, so due to the slack manufacturing tolerances of the clones, upgrades can be hit and miss, but as i mentioned, the Rovan diffs are wider regardless :)
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Thanks for the info. I think I’m going to put the innovative rc hd diff with new bearings and gears then. Any info on if anybody is having problems with those diffs? They seem to be pretty solid
 
Adam1234 said:
Thanks for the info. I think I’m going to put the innovative rc hd diff with new bearings and gears then. Any info on if anybody is having problems with those diffs? They seem to be pretty solid
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No problem

Yeah they're solid and give you the option of running bearings or bushings for the smaller bearings. Depending on your use then all bearings will be fine. Some run a combo of bushings/bearings, and the big bore boys usually run all bushings because the bearings can explode.

Anyway, that will solve the problem of the diff not fitting, i ran the IRC diff with Rovan internals once, no problems
 
gavsta72 said:
No problem

Yeah they're solid and give you the option of running bearings or bushings for the smaller bearings. Depending on your use then all bearings will be fine. Some run a combo of bushings/bearings, and the big bore boys usually run all bushings because the bearings can explode.

Anyway, that will solve the problem of the diff not fitting, i ran the IRC diff with Rovan internals once, no problems
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Awesome! What weight diff fluid do you run? I was reading 500k was good for bashing?
 
Adam1234 said:
Awesome! What weight diff fluid do you run? I was reading 500k was good for bashing?
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I run the RCMAX hexlock diff locker, but i run the Outlaw Hybrid which uses the Baja rear end. The Baja I was referring too was built for a big bore engine so it had 1million weight oil.
500k is too much for bashing, especially for a small bore. That's pretty much locking the diff.
20-30k seems to be a happy medium for a small bore and general bashing from what i've read over the years, any thicker and it just won't turn
 
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gavsta72 said:
I run the RCMAX hexlock diff locker, but i run the Outlaw Hybrid which uses the Baja rear end. The Baja I was referring too was built for a big bore engine so it had 1million weight oil.
500k is too much for bashing, especially for a small bore. That's pretty much locking the diff.
20-30k seems to be a happy medium for a small bore and general bashing from what i've read over the years, any thicker and it just won't turn
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Thanks again for the good guidance. I’m a new guy to the 5th scale world, but really enjoying it so far
 
Troopermaniac said:
my Rovan diff did fit in mine. However once that explodes and make no mistake it will. I want to go with possibly an IRC setup. The fit was super close though I vaguely remember having to shave off the bolt heads a bit to get it to spin freely in the case.
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I had that problem, but i just removed the spring/lock washers from the bolts. They're not needed anyway, that's what loctite is for
 
gavsta72 said:
No problem

Yeah they're solid and give you the option of running bearings or bushings for the smaller bearings. Depending on your use then all bearings will be fine. Some run a combo of bushings/bearings, and the big bore boys usually run all bushings because the bearings can explode.

Anyway, that will solve the problem of the diff not fitting, i ran the IRC diff with Rovan internals once, no problems
Click to expand...
Any ideas? Literally 100 dollar irc diff will not fit. Has to be some type of measurement issue with the tr quick diff?
 

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