Tranny Question....
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Junior Member
Joined: Aug 2008
Posts: 39
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From: Anchorage, AK
Tranny Question....
In my ITR my tranny is a S4C tranny and it also has S4 printed on it. Do you guys know what tranny this came exactly? And is it equip with LSD or is it optional LSD.
Honda-Tech Member
Joined: Aug 2007
Posts: 9,865
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From: Oregon
Re: Tranny Question....
i think the ctr trannies have R4 LSD in black ink just like the ITR has J4D LSD. you should be able to look through the axle hole and see what diff is in there. the LSD is hollow, as in no bar
Thread Starter
Junior Member
Joined: Aug 2008
Posts: 39
Likes: 1
From: Anchorage, AK
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Honda-Tech Member
Joined: Jan 2000
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From: Hockeytown, MI
Re: Tranny Question....
Its a pain in the ***, but I bet you can do it in like 30 minutes, if you had a friend.
-Take out your spark plugs
-Put the car in each gear and spin the crank a set # of times, like 100 rotations, and keep track of how many times the wheel rotates. Make sure you count partial rotations. Accuracy is important
-Divide crank rotations by wheel rotations, and that will give you your gear ratios multiplied by your final drive ratio
-Divide all the ratios by the common FD ratios (4.40, 4.785, 4.929, etc) to give your 1-5 gear ratio for each possible final drive.
-Reference something like this (no guarantee on accuracy of this particular dataset): http://hondaswap.com/reference-mater...n-specs-29132/
and you should match one of those trannies pretty close!
Obviously, it would be much easier with a friend to count wheel while you count crank, and keep a spreadsheet.
If you had a very stable idle and accurate (digital) RPM reading, you can do the same thing by idling the car in gear on jackstands and timing (stopwatch) how long it takes to go a mile on the trip
-Take out your spark plugs
-Put the car in each gear and spin the crank a set # of times, like 100 rotations, and keep track of how many times the wheel rotates. Make sure you count partial rotations. Accuracy is important
-Divide crank rotations by wheel rotations, and that will give you your gear ratios multiplied by your final drive ratio
-Divide all the ratios by the common FD ratios (4.40, 4.785, 4.929, etc) to give your 1-5 gear ratio for each possible final drive.
-Reference something like this (no guarantee on accuracy of this particular dataset): http://hondaswap.com/reference-mater...n-specs-29132/
and you should match one of those trannies pretty close!
Obviously, it would be much easier with a friend to count wheel while you count crank, and keep a spreadsheet.
If you had a very stable idle and accurate (digital) RPM reading, you can do the same thing by idling the car in gear on jackstands and timing (stopwatch) how long it takes to go a mile on the trip
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