m5r2 vs 351w

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Mar 23, 2011 | 01:07 PM

21411

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From: chicago burbs

m5r2 vs 351w

i'm building a 64 f100, i've got a 351w from a 72 galaxie and a m5r2 with tranfer case from 91 f150.

now my question is will the 351 tear up the trans? will i be able to tow my 3500# boat and camping gear? or should i just leave the t18 2x4 setup.

any help would be great. thanks everyone.

Mar 23, 2011 | 01:48 PM

andym

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From: Bonita Springs FL

Towing that much weight with a M5R2 and a 351w is probably not going to end well. How much torque does the 351w make? If it's much more than 275 I would stick with the T18.

Mar 23, 2011 | 02:00 PM

Scrambler81

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My 95 F150 5.0l had a m5r2 in it and I wasn't real impressed with it. I put a few heavy loads of fire wood around 800-1,200lbs, skids about 700- 1,000lbs, and scrap metal 970lbs in it and it just didn't want to pull the truck down the road. As far as towing it pulled a small pop up camper 700-800lbs fine but refused to pull our 1 ton van 6,000lbs out of a mud hole without the aid of 4 wheel low and a snap tow. I was glad when it died and I put a ZF S542 in it's place which does everything I want it to do and more. It might work better behind a 351w but behind my 302 it sucked. I hope this helps.

Mar 23, 2011 | 02:03 PM

21411

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From: chicago burbs

i think the stock torque is 300+, thats why i wanted the 351 over the 302, which i also have but 302 is in trouble. and i was planning on running propane and bumping settings for smore power. maybe not the best idea huh.

what about just driving around putting lumber in bed? different load on trans?

Mar 23, 2011 | 02:05 PM

andym

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The motor was half the problem I think. The gearing in the M5R2 isn't very good for towing, but the 302 just makes it worse. I towed everything you described and more with my 300/M5R2 F-150.

Mar 23, 2011 | 02:11 PM

21411

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From: chicago burbs

Scrambler81

thats another concern, as far as i can tell ford never put the m5r2 behind the 351. i'm assuming for a good reason. maybe i should post to the market place.