Auto vs stick
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Elder User
Joined: Mar 2004
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Auto vs stick
Why are Auto trans. rated to pull heavier trailers than Sticks. I have 96 f-150, If I had the auto It would be rated to haul 7100lb. But since I have a stick it is only rated to haul 3500lb( same engin and rear gear ratio ..5.0L, 3.55}
Why is there such a differance??\
I have to haul 2-3 horse to WY from Reno a load of4500-5500
And I'm wondering if my truck can do it. I plan to put a new Luk pro gold clutch in . any one out there have any thoughts?? It seem to me that a 1/2 ton should be able to pull 5k!!??
Thanks to any one with thoughts.. James
Why is there such a differance??\
I have to haul 2-3 horse to WY from Reno a load of4500-5500
And I'm wondering if my truck can do it. I plan to put a new Luk pro gold clutch in . any one out there have any thoughts?? It seem to me that a 1/2 ton should be able to pull 5k!!??
Thanks to any one with thoughts.. James
Postmaster
Joined: Jul 2003
Posts: 2,711
Likes: 2
From: Pittsburgh
It's on starting that the auto gets the higher rating. When the torque converter slips it can up to double the available torque of the motor making it easy to take off. This allows their (approximately) 3:1 first gears to act like 6:1's. With you're "high geared" transmission you probably have about a 3.2:1 first gear but without the benefit of converter slip, you ONLY have a 3.2:1. That's why serious hauling trucks with sticks get granny gear or compound first transmssions (both different names for same thing). The first gear on those is typically deeper than 6:1 so they have the same starting capabilities of an automatic equipped truck.
Justin
Justin
