Tanny ID???/
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Tanny ID???/
I have a 67 F100 that was fitted with a 351 cleveland from a 1972 ford torino. I dont know what the tranny is. The guy i bought it from sd it was a C6 but the oil pan is perfectly square. Any ideas? Also I am trying to figure out my rearend gear ratio, any ideas?
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From: Coal Region
a lot of 351Cs were outfitted w/ the FMX aut tranny. count the number of bolts holding the oil pan on. if theres 14 then its prolly a FMX. also for ur rear end ration, check the axle ID tag, should be printed there. if not ur gunna have to pull the center section out and count the gears and divide the ring by the pinion...
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Dang that sux, i was hoping for a lower gear.... 3.00??? That doesnt make sense to me considering the truck came with factory 352 and a 3 speed. I thought they had 3.25 at the worst. Oh well, I need 3.70 or higher any suggestions?
What is an FMX tranny, C4, C6? are they good, bad. Do i need a new tranny too?
What does Open Differential mean?
What is an FMX tranny, C4, C6? are they good, bad. Do i need a new tranny too?
What does Open Differential mean?
Last edited by rangoonred67; Jul 15, 2004 at 08:07 PM.
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From: Coal Region
the FMX is an older design tranny and is very old technology also more expensive to rebuild. u would be better off with a C6 IMO. also an open differental means that when ur on say wet asphalt and ur tires start to spin, only one will get the power while the other will just follow along. basically only one tire has traction...
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Jeez, I am screwed. I got a open dif with an old pice of ^$#@ tranny. I just spent $2400 on my motor and it is screaming. Now i gotta go through all this. Well the tranny is shifting good so it will work for now. What about a ring and pinion change for the dif? Can I get a locker? Basically what i am asking is can i turn this dif into a 3.70:1+ posi???? ................BTW Thanks FTE you guys rock!!!!
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From: Coal Region
nuttin wrong with the FMX tranny but when it needs to be rebuilt id consider a C6 or AOD swap.
a gear swap shouldnt cost to much. also, u could try to find a center section from a different truck with a different ratio and L/S already and just drop it in...just a suggestion...
a gear swap shouldnt cost to much. also, u could try to find a center section from a different truck with a different ratio and L/S already and just drop it in...just a suggestion...
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well its all good and fine but im runnin 400+ horsepower and 420+ ft/lb of torque. I need sumthin that will stand up to that. Im not just tryin to make it run, im tryin to make it hall ***. will the gear swap work ok, ring and pinion i mean? what will I need to do to the rear to make it right for that kind of power? Please help. I was already considering a tranny from TSI but I wasnt wanting to do that yet. FYI, I am trying to make an old 67 that weighs 4000lb to outrun a Z28 in short distance, not worried about top speed, but from stoplight to stoplight and 1/4 mile I wanna make them jealous. Ive got the power in the motor now I just need to put it to the ground. I will appreciate any suggestions.
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From: Coal Region
well im pretty much outta ideas but as long as u can get ur truck to hook i think u'll be fine. ur geare ratio sounds good for a non OD tranny as long as u dont plan on doin 80 on the interstate. but id be worried bout the tranny if ur gunna run that much power. if u can, locate a C6 and throw a good rebuild at it and a shift kit.
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what gear ratio for 80 on the interstae? the 3.00 or the 3.70+. I was actually looking at a 3.89:1 ring and pinion. thanks for all your help, i really appreciate it. Im ok at making the engine make durable power but the tranny and rear i am at a loss.
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Rangoonred, what size tires are you running on that truck? Tire size makes a big difference in what gear ratio will be best for your intended use.
For dragstrip performance, you want a low ratio (higher numerically) which gives greater acceleration and higher rpms in each gear.
As for the traction-adding differential, there are a few of them available for the 9" rear end:
For a full-time automatic locker, which will give power to both tires under ALL conditions, there is the mighty Detroit Locker (visit www.tractech.com ) which uses it's own gear case, and there are the EZ Locker (TracTech again), LockRight (visit www.powertrax.com), Performance Locker (a HD LockRight) and NoSlip (powertrax again), which go in the stock open case and perform the same function as the Detroit at a lower cost.
For clutch-type limited slips, there is the OEM optional Ford Traction-Lok, and a couple versions from Auburn Gear as well.
For gear driven torque-sensing limited slips there are the TracTech TrueTrac and the the Torsen T2.
Check out www.reiderracig.com www.currieenterprises.com and www.ring-pinion.com for lots of diff and gear choices for your 9" axle. Currie is a custom builder of 9" axles for racing and offroading and can set you up with anything your heart desires and wallet will allow for that axle.
Good luck with the project! Sounds like alotta fun
.
For dragstrip performance, you want a low ratio (higher numerically) which gives greater acceleration and higher rpms in each gear.
As for the traction-adding differential, there are a few of them available for the 9" rear end:
For a full-time automatic locker, which will give power to both tires under ALL conditions, there is the mighty Detroit Locker (visit www.tractech.com ) which uses it's own gear case, and there are the EZ Locker (TracTech again), LockRight (visit www.powertrax.com), Performance Locker (a HD LockRight) and NoSlip (powertrax again), which go in the stock open case and perform the same function as the Detroit at a lower cost.
For clutch-type limited slips, there is the OEM optional Ford Traction-Lok, and a couple versions from Auburn Gear as well.
For gear driven torque-sensing limited slips there are the TracTech TrueTrac and the the Torsen T2.
Check out www.reiderracig.com www.currieenterprises.com and www.ring-pinion.com for lots of diff and gear choices for your 9" axle. Currie is a custom builder of 9" axles for racing and offroading and can set you up with anything your heart desires and wallet will allow for that axle.
Good luck with the project! Sounds like alotta fun
.
Last edited by SoCalDesertRider; Jul 16, 2004 at 05:00 PM.
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