Any Differences in gear ratios?
- Thread starter bboytou
- Start date
CMS-GT4
Active member
The gears in the GA are not stronger. They share the same part number as gears in other gt4 boxes. They first and second ratio are lower, and 2nd and 3rd are the only ones with special syncros. IMHO I do not like the box. I have one and for autox the 2nd gear is too low, and 3rd is too high. Stick with a standard gt4 box. I would like to have a GT4 Rally even though 5th gear is of no use. It has a very close ratio to 4th.
So what you guys are saying that if i put the jdm tranny in then I will be limited on my top speed,... right? Like for 4th gear in my usdm I can go about 119 mph and for fith gear I can go maybe even higher( that's because I've never gone faster then 119mph). So I guess for the jdm fith gear is like the usdm 4th, right? Geez! if it is, then that sucks. Do you guys think it'll kill more gas too?
CMS-GT4
Active member
No, it is not. The final drive is higher, as in a higher gear ratio. Better fuel econ. They made the 1st two gears lower so they would compare to the older ones, but the other ratios are the same. It moved the 2nd further from third, which I do not like. You would raise you top speed with this box.
to the gt4 gurus,
I have a jdm185 gt4 RC (no hoodscoop, just an air vent) front clip, I plan on putting the tranny of the gt4 RC on my normal st185gt4, if I do so should I also install the rear diff of the gt4 RC to my car....or will it still be ok with the normal stock diff? My problem is the gt4 RC front clip did not come with the rear diff.
Next question, is the 1st to 2nd closer with the RC gearbox as compared to the standard gt4 tranny?....does the 2nd gear and third gear have double syncros? Is the 3rd gear ratio the same as that of the standard gt4?
Regarding the engine the RC comes with WTA intercooler right? Is the head and camshaft profile the same as the standard GT4? Does the GT4RC have buket over shim cam followers? Is there still a TVIS in the GT4RC?
All you experts please give me an answer...thanks
I have a jdm185 gt4 RC (no hoodscoop, just an air vent) front clip, I plan on putting the tranny of the gt4 RC on my normal st185gt4, if I do so should I also install the rear diff of the gt4 RC to my car....or will it still be ok with the normal stock diff? My problem is the gt4 RC front clip did not come with the rear diff.
Next question, is the 1st to 2nd closer with the RC gearbox as compared to the standard gt4 tranny?....does the 2nd gear and third gear have double syncros? Is the 3rd gear ratio the same as that of the standard gt4?
Regarding the engine the RC comes with WTA intercooler right? Is the head and camshaft profile the same as the standard GT4? Does the GT4RC have buket over shim cam followers? Is there still a TVIS in the GT4RC?
All you experts please give me an answer...thanks
CMS-GT4
Active member
nosboy":21b5dk01 said:
The rear diff ratios are all the same in all g4s. So switching out is not nessesary. As from a handlng perspective the rear torsen from an RC is better then the stock open diff. You can always get a clutch type lsd down the road if that mattered to you.
As I said in my other post, the 2nd and 3rd gears are the only ones with special syncros, and the third gear thru 5th are the same. zThe final drive is also higher.
The RC engine only has a wta ic. as for the engine specs i'd ask the folks at gt4oc.com The only detail I know of are the head is designed to disipate heat more. Other then that the engine should be close to a normal 185 engine.
cheers,