[IROC383]

Hey guys,
Anybody use a Rankin in their race car? Mine makes a LOT of noise while driving. I know th usual stuff.
Could there be a shim option to make shifting not so hard on the gears. I want to make sure I'm not damaging my tranny before I ruin it. Thanks for all the input.

[Beach Cruiser]

I'm going to be putting one in my racecar this coming weekend, I'll let you know my experience.

[Shortcutsleeping]

Rankin is a pretty broad term as it denotes the shop that built it. They can (and have) built straight cut gear boxes with dogs, straight cut gear boxes with syncros and several versions of helical gear internals.

So, let us know specifically what you have and we might be able to help.

A "shim option" to be "not so hard on the gears" is pretty vague as well. The gears really don't get worn during shifting as they are ALWAYS meshed to their partner gear (like all transmissions), but the dogs can take some wear due to slow or 'limp' shifting simply because they are designed to be shifted fast and firm. Even then, the dogs wear and won't last like a typical helical/syncro box. They are not designed for 'gentle and easy' (street) use and, predictably, they fail miserably at it.

Straight cut boxes make noise. I'd need to hear it myself in order to tell you if the LOT OF NOISE is really excessive or just normal. By pulling the unit apart and checking the bearings and the preload on the stack you can at least figure out if your box is likely having a problem or not. Shifting issues on these boxes tend to be fairly evenly split between wear/setup/preload inside the box or arm angle/shift rod preload/shifter setup outside the box.


Costas
cars and such...

[IROC383]

[quote name='Shortcutsleeping' date='Aug 5 2014, 11:07 PM' post='180248']
Rankin is a pretty broad term as it denotes the shop that built it. They can (and have) built straight cut gear boxes with dogs, straight cut gear boxes with syncros and several versions of helical gear internals.

So, let us know specifically what you have and we might be able to help.

A "shim option" to be "not so hard on the gears" is pretty vague as well. The gears really don't get worn during shifting as they are ALWAYS meshed to their partner gear (like all transmissions), but the dogs can take some wear due to slow or 'limp' shifting simply because they are designed to be shifted fast and firm. Even then, the dogs wear and won't last like a typical helical/syncro box. They are not designed for 'gentle and easy' (street) use and, predictably, they fail miserably at it.

Straight cut boxes make noise. I'd need to hear it myself in order to tell you if the LOT OF NOISE is really excessive or just normal. By pulling the unit apart and checking the bearings and the preload on the stack you can at least figure out if your box is likely having a problem or not. Shifting issues on these boxes tend to be fairly evenly split between wear/setup/preload inside the box or arm angle/shift rod preload/shifter setup outside the box.


Costas
cars and such...
[/quote


Costas,
I think you answered my question. I tested the car over the weekend at a small airport. Going to race in Charlotte soon. I noticed the more firm I was with the tranny the better it shifted. I think training the ear to up shift at the right time is key.
I'll respond to post after the race weekend.

[Beach Cruiser]

I finally got mine up to me from Charlotte. A couple of questions on your install. Did you plumb in a cooler? Do you know if all Rankins came with an oil pump or gear squirters? Here's a picture of mine, do you know what the 90 AN fitting on top is for? I'm having difficulty finding any info on Rankins. Vent?
(IMG:http://i539.photobucket.com/albums/ff356/n2sking/A489A7CB-AC31-461E-BA5C-BA82FE19639B_zpsxsfrfgfo.jpg)