Picked up a 91 Power Ram 350 - Have a few questions

gonecrazyi

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I just picked up a 91 cummins power Ram 350. Its been sitting a while and needs some work but starts right up and runs pretty well down the road. I needs the window motors fixed and the headlight switch is bad. But I drove it 50 miles how without any problems.

I believe it has 3.07 gears due to the dana 61f in the front of it. It pulls strong but could use some more fuel.

I bought it from the original owner who had ordered it direct from chrysler. It is not intercooled but will be soon when I disect the 92 I have posted in an earlier thread.


I was wondering what transmission usually came behind these motors. Being a 91 it looks like it could be a 727 or a 518.

Also, the body is in good condition except for the cab. How hard is it to fix or would it be better to do a roof swap off of a clean truck. The other cab I have is clean on the roof but a bit rusty on the rockers.




What would you guys recommend for a lift. I have a nice set of 38s I plan to use so Im figuring I need at least 6inches. Then I need more fuel to make up for the lack of gearing lol. I may try and get an underdrive to help it out off road.
 

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gonecrazyi

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Ill get some more pics of it. They look close to the same. the 61 has 61f stamped in the differential by the yoke.
 

chvycmnslvr68

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If they really are 3.07 ratio I would love to get my hands on them .. would you trade for some 3.73 or 4.10 gears ... I have been looking for higher gears for my chevy so i can get the fuel mileage up a bit more .. right now i get about 26 on the hi-way and 18 around town if i keep my foot out of it .. BTW I would just cut the window posts and replace the roof ... at least that way you wont get into VIN problems and it would be easier than fixing the rocker rust on the other cab ... By the way I have a 93 Cummins in it ...
 

gonecrazyi

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There 3.07s. You need a Dana 61 to run them. I want to see how well they work with more fuel and 38s before pulling the axles out
 

The Warden

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I believe it has 3.07 gears due to the dana 61f in the front of it. It pulls strong but could use some more fuel.

I was wondering what transmission usually came behind these motors. Being a 91 it looks like it could be a 727 or a 518.
I'm by no means an expert on Dodges, but I've always been under the impression that any 3 speed automatic behind the Cummins will be a TF727, and that they only used 3.07 rear ends with the 727 (since the governor's set so low that IIRC with the 727, she would be right at the governor at freeway speeds with 3.54's and will govern out before 55 mph with 4.10's). IIRC the 518's a 4 speed with OD, so if you have an OD on/off button, it's a 518 and it's a 727 otherwise.

Not bad lookin'...sounds like you'll have fun with it ;Sweet
 

gonecrazyi

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She's definitely got a 727 lol. She cruises pretty good at 70. A little slow off the line but quick once the turbo spools.
 

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