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Old 08-16-2012, 06:26 PM
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ramvan2500 ramvan2500 is offline
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Join Date: Apr 2011
Location: Florida USA
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Vehicle: 1995 Dodge Ram B2500 Van
Trim Level: SLT - 2500
Color: Deep Molten Pearl Coat, Silver, Grey
Engine: 1994-2001 318ci (5.2L) Magnum V8 220hp
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Quote:
Originally Posted by JeffreyCH View Post
My buddy's 99 does that with reverse, kind of slips till it's warmed up. We were thinking the trans pump might be getting weak. Dodges do have a trans hydraulic pump right? (I know GM 's much better then Mopar but have become a convert lol) Also, when was the last time you had the trans fluid/filter changed? (not just a fluid drain, but a full flush of the torque converter) Could just be gummed up and not working proper until it gets warm enough to loosen the gunk up.

ramvan, what is this band adjustment you are talking about? Is this something that needs to be done as part of routine maint? Can the average guy do that with common hand tools or are special tools, gauges or whatever needed?

Actually the GM pump and Mopar pump are the same type it is a gyro rotor pump, it's an amazing design. The pump can literally supply a pressure over 10,000 PSI easy but that's what pressure relief is for. Anyways, the pumps generally last a lifetime you have to remember it is for the most part always in contact with transmission fluid which serves as a hydraulic fluid and coolant to the transmission. Anyways to test the pump you can just pop off the return line from the transmission and with a clean clear plastic bottle that is 1 quart or larger just snake the line into the bottle, then have a helper turn the truck on and shift it into neutral and count, the pump should be able to supply 1 quart in 20 seconds or less. The time will vary on what kind of cooling setup you have, I have a external cooler that required the fluid to travel against gravity so I can slow it down to cool it better and to keep pressure high and air out, then it goes into the stock cooler which is built into the radiator, from this my trans pump is supplying 1 quart in about 10 seconds at idle. But the industry standard for these transmissions is 1 quart within 20 seconds.

As far as the band adjustment, only tool you need is a inch lbs torque wrench which you can get at any autopart store, or harbor freight they have them on sale I think for 12.99 or something like that.

The band adjustment frequency depends on how you use the truck, if you TOW often and spend much time in 2nd gear then adjust the front band every 12,000 miles at the rear band every 24,000-48,000 miles.

If you are just regular old run of mill driver then you can get away with front band adjustment every 36,000-50,000 miles. The rear band you don't have to adjust often because it's only applied in reverse and manual 1st and even in manual 1st you still have an overrunning clutch to hold the rear drum so the band won't see a whole lot of wear. But the rear band should be adjusted probably every 50,000 miles. It just depends on driving habits and crap like that.

The rear band adjustment is done internally so you need to remove the fluid pan, the front band adjustment is done externally. The front band adjuster is located behind the shift linkage that would be on the driver side of the vehicle.


To do a band adjustment for the front, just loosen the locknut then tighten the band adjuster with the torque wrench until you hit 72 inchs lbs, then turn the adjuster counter clockwise 3 turns and then tighten the locknut, you should torque the locknut to 25-30 ft-lbs.

The rear band is the same procedure except you want to backoff the adjuster only 2 turns.
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