91 f150 towing capacity

May 30, 2005 Last reply: 21 years ago 14 Replies

got a 91 f150 4.9l efi 4x2, recently had aod tranny rebuilt w/ heavy duty torq conv installed. any ideas what my towing capacity would be? wanna get a travel trailer.


with an AOD ?

forget it

the AOD's infamous 'chug-a-lug' third gear will drive you nuts

You still have your owner's manual? It'll tell you in plain language what the towing capacity is with your engine, transmission, and gear ratio combination.

CJB

What gear ratio in the differential? It makes a big difference.

-D

ever consider a pop up trailer?

It is more a matter of final drive ratio in rear axle than the "chug a lug" tranny. If your rear axle ratio is around 3.55 or taller with a OD and that 4.9, it will not tow well but it you gear it up to 4.10 or so it will do a good bit better. It will not be a barn stormer but it should do okay up to 5000lbs or so with deeper gears (if you want to go through the trouble of changing them) otherwise I would limit myself to popup campers as it sits now.

The trouble is that some of the owners manual tow ratings are more dream than reality as they do not really factor in wind drag from big cross sectional trailers nor hilly terrain or whether for highway speeds too. A 4.9 with automatic and stock gearing is going to be a marginal tower at best. There is not much reserve power in that truck for towing as it sits.

you're not REAL familiar with how the AOD is set up, are you ?

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Probaly a lot more familar with transmisson and gear limitations than you think! I actually have a working 83 AOD in the barn right now. (pull from a vehical I junked out)

oh, wow

I'm impressed

so tell me what the power flow is in an AOD in 3rd................this bears directly upon the problems found when towing with one

Gee I did not know there was "bears" in a AOD. That is news to me! You are just looking to start something here and if I answer your question, and pass your "test" then what gonna be the next one?

hey, YOU are the one who claimed extensive knowledge of the workings of the AOD

if you don't know, just say so and we'll forget it.......BUT

I notice you've posted your 'knowledge' to all the truck groups the last few days, including that howler about the 'slug of freon or oil' in the evaporator of a GM AC ..............

your kind comes and goes with regularity around here.......now, about how the AOD works............ball's in your court, bucko.

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