Spicer 7-speed - Dodge Cummins Diesel Forum
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post #1 of 19 (permalink) Old 11-30-2008, 04:23 PM Thread Starter
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Spicer 7-speed

Anyone ever, or anyone know of anyone who has installed a real truck transmission in a Ram? I'm really considering doing it but I'm deathly afraid of how bad it will drive empty. I'm sure it would work with a load, but I drive about 70% empty and about 30% really heavy. The one I'm considering is a Spicer ESO66-7B Ratio's seam perfect. I'm pretty sure I can make it fit. It has a speedo drive, has a good overdrive, and a good first gear. I'd like a little more reverse gear but it would still be better than a G56 and twice the trans. The link to the info is below for the trans. I'm sure I could get southbend to make a clutch for it. Seams like a heck of a project, but I've already got a B5.9 and a 6 speed spicer (No overdrive) with a clutch and everything as cores for the upgrade laying on the garage floor out of a FL70. I can mock everything up as the spicer 6-speed and 7speeds are identical in size.

http://www.ttcautomotive.com/English...df/2366_13.pdf

What do you all think?


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post #2 of 19 (permalink) Old 11-30-2008, 04:33 PM
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couple threads in the 'swap' forum where guys have done 10speed road rangers...

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post #3 of 19 (permalink) Old 11-30-2008, 06:38 PM
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Running MT just skip shift like a guy bobtailing does.

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post #4 of 19 (permalink) Old 11-30-2008, 06:45 PM
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I'm sure it's possible, but they 7 speed spicer i drove in an international highline digger, i didn't like it. i thought it was hard to find gears, I've got no problem in 10 or 13 speed Road Ranger, but if you have driven them and like it, I'd go for it. I just personally would want one for a daily driver.

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post #5 of 19 (permalink) Old 11-30-2008, 07:04 PM
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i have rebuilt one.they seem to be well made, it was not big enough for a truck with a 22 ft van on it, but it should hold up just fine in a "little"truck.I think it shifted hard though.

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post #6 of 19 (permalink) Old 11-30-2008, 07:14 PM
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Couple threads about "big" trans for the Dodges.
Fuller trannys and RoadRanger ten speeds - Cummins 4BT & Diesel Conversions Forums
Spicer 3053A 4bt combo - Cummins 4BT & Diesel Conversions Forums

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post #7 of 19 (permalink) Old 11-30-2008, 07:22 PM
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Dont get me wrong because im not trying to be a smart a$$ but WHY a 7spd.Just get the 6spd and enjoy.

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post #8 of 19 (permalink) Old 11-30-2008, 07:43 PM
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Better question..... Why a 7 speed? Why not a ten!

Oh, that's my thread over on the 4BTSwaps forum! LOL!!
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post #9 of 19 (permalink) Old 11-30-2008, 07:52 PM
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Quote:
Originally Posted by deerefanatic View Post
Better question..... Why a 7 speed? Why not a ten!

Oh, that's my thread over on the 4BTSwaps forum! LOL!!
hell, if your gonna go that far why not put in an 18? the 10, 13 and 18 speeds all shift the same, its just the 13 and 18's you can split gears

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post #10 of 19 (permalink) Old 12-01-2008, 08:44 AM
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The ten speeds that I'm looking at (RTO-610 and 6610) are a medium duty transmission.... Only weigh around 380lbs or so........ The 13speed and up trannys are heavy duty and weigh MUCH MUCH more, have MASSIVE bellhousings and might not even fit between the frame rails of a light truck........ Plus, for streetability on a 5.9, I doubt you want 250lbs of flywheel/clutch for a SAE 1 Bellhousing whirling around......
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post #11 of 19 (permalink) Old 12-01-2008, 09:02 AM Thread Starter
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Well the reason for NOT doing the 6 speed is long term durability. I don't believe the newer trucks are "million mile trucks". The 12 valve trucks are fantastic. The only weak link is really the transmission. I would like to see a million mile engine attached to a transmission that is slightly overkill so possibly it could be a million mile drivetrain.

I don't know of anyone that has 500k on any production pick-up truck transmission (automatic or manual) that tow with them 10k+ on a regular basis. My NV4500 has never failed to get me home except 1 time when it stapped the main shaft but that was not the transmission's fault as it had a clutch that was too aggressive and I had a heavy trailer with excessive clutch chatter (or rear end wrap....depends on your perspective).

Anyway why not a 10 speed?..... We'll...The only advantage really to a 10 speed over a 7 speed is that it is tighter between gears. These engines have a broader powerband than an over the road truck. I realize you get more choices of gear selection. Right now I'd like a little less drop on the 3-4 and a little more 1 st gear. Othewise, the powerband of the engine does fine with the gear drops.
Also with the 10 speed vs. a seven speed is less rotating mass, and 30% less parts (10 vs 7). Sure it would be cool, but I've got a pretty good case of A.D.D. anyway! 10 gears may be too many choices!

1996 12-Valve NV4500 RWD 3.54 Club Cab. 19.5's, #10, PacBrake, AFE Mega Cannon, 16cm exhaust housing, 4" straight piped. 43X,XXX miles and still strong! 2006 4wd Auto. All the bells and whisles! 152,XXX, So far so good!
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post #12 of 19 (permalink) Old 12-01-2008, 09:05 AM Thread Starter
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Oh' yea....the other reason is there aren't too many choises with overdrives in the big transmission world.

1996 12-Valve NV4500 RWD 3.54 Club Cab. 19.5's, #10, PacBrake, AFE Mega Cannon, 16cm exhaust housing, 4" straight piped. 43X,XXX miles and still strong! 2006 4wd Auto. All the bells and whisles! 152,XXX, So far so good!
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