Attn 4L60E Experts....
Thread Starter
Racer
Joined: Dec 2003
Posts: 346
Likes: 10
From: New Orleans La
Attn 4L60E Experts....
I was under the impression that by running 2.73 gears I was most likely prolonging my tranny life. My reasoning was that I do the majority of my WO pulls in 1st or 2nd gear which have the extra holding capacity and usually don't fail. My question is does the extra holding capacity offset the added stress on the transmission from having such a small gearing?
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Demented;
going with more ratio actually makes it easier on your tranny... giving it mechanical advantage. If you go from your 2.73 to say... 3.42
then it removes some stress from the tranny... at least theoretically.
The only thing it adds stress to are the carrier output shafts and the half shafts.
going with more ratio actually makes it easier on your tranny... giving it mechanical advantage. If you go from your 2.73 to say... 3.42
then it removes some stress from the tranny... at least theoretically.The only thing it adds stress to are the carrier output shafts and the half shafts.
Thread Starter
Racer
Joined: Dec 2003
Posts: 346
Likes: 10
From: New Orleans La
I'm aware of that...the issue I was raising was does going up to a 3.42/3.73 type ratio do more harm because I will be racing in 3rd gear where as now I can race solely in 1st and 2nd. I remember reading somewhere that 1st/2nd gear have more holding capacity than 3rd and 4th.
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
Originally Posted by Demented
I'm aware of that...the issue I was raising was does going up to a 3.42/3.73 type ratio do more harm because I will be racing in 3rd gear where as now I can race solely in 1st and 2nd. I remember reading somewhere that 1st/2nd gear have more holding capacity than 3rd and 4th.
Changing to a higher ratio final drive will lower the stress linearly in all gears.
So unless you have done something to alter the torque curve of the engine (like NO2) in 3rd gear don't sweat it.
Frankly I would be more concerned about going over 6500 rpm input shaft speed since the reverse input housing likes to get bellmouthed and rip the case apart.
