2001 ram 2500 won't shift into overdrive after engine swap

Asked by Feb 28, 2015 at 04:16 PM about the 2001 Dodge Ram 2500 4 Dr ST 4WD Quad Cab LB

Question type: Maintenance & Repair

Just had to change the engine in my 2001 dodge ram 2500 with a v10. I put an other 2001 V10 in .The motor purrs like a kitten. I know the computer takes a little time to reset it's self. The problem is that the tranny won't shift into overdrive now. The tranny worked fine before the engine swap. I'm thinking that the TV (throttle valve) cable needs to be readjusted, but not sure. Any answers to help fix the problem would be very helpful.

1 Answer

4,645

here is the power flow for fourth gear....sounds like you might have unplugged a electrical connector or didn't get it all the way in ...or pinched or pulled out a wire during engine swap...// FOURTH GEAR POWERFLOW Fourth gear overdrive range is electronically controlled and hydraulically activated. Various sensor inputs are supplied to the powertrain control module to operate the overdrive solenoid on the valve body. The solenoid contains a check ball that opens and closes a vent port in the 3-4 shift valve feed passage. The overdrive solenoid (and check ball) are not energized in first, second, third, or reverse gear. The vent port remains open, diverting line pressure from the 2-3 shift valve away from the 3-4 shift valve. The overdrive control switch must be in the ON position to transmit overdrive status to the PCM. A 3-4 upshift occurs only when the overdrive solenoid is energized by the PCM. The PCM energizes the overdrive solenoid during the 3-4 upshift. This causes the solenoid check ball to close the vent port allowing line pressure from the 2-3 shift valve to act directly on the 3-4 upshift valve. Line pressure on the 3-4 shift valve overcomes valve spring pressure moving the valve to the upshift position. This action exposes the feed passages to the 3-4 timing valve, 3-4 quick fill valve, 3-4 accumulator, and ultimately to the overdrive piston. Line pressure through the timing valve moves the overdrive piston into contact with the overdrive clutch. The direct clutch is disengaged before the overdrive clutch is engaged. The boost valve provides increased fluid apply pressure to the overdrive clutch during 3-4 upshifts, and when accelerating in fourth gear. The 3- 4 accumulator cushions overdrive clutch engagement to smooth 3-4 upshifts. The accumulator is charged at the same time as apply pressure acts against the overdrive piston.

Your Answer

Add photo

Related Questions

Search Dodge Ram 2500 Questions

Dodge Ram 2500 Experts

#1 Dan Connell
Dan Connell
Reputation 2,180
#2 Ram2500Diesel
Ram2500Diesel
Reputation 610
#3 tennisshoes
tennisshoes
Reputation 510
View All

Related Models For Sale

Used Dodge Ram 3500
64 Great Deals out of 2,245 listings starting at $3,998
Used Ford F-250 Super Duty
320 Great Deals out of 46,236 listings starting at $599
Used Chevrolet Silverado 2500HD
282 Great Deals out of 28,178 listings starting at $2,500
Used Dodge Ram 1500
438 Great Deals out of 10,939 listings starting at $1,000
Used GMC Sierra 2500HD
109 Great Deals out of 13,298 listings starting at $2,650
Used Ford F-150
2,067 Great Deals out of 208,410 listings starting at $290
Used Ford F-350 Super Duty
409 Great Deals out of 25,725 listings starting at $1,995
Used Chevrolet Silverado 1500
1,839 Great Deals out of 182,569 listings starting at $1,595
Used Chevrolet Silverado 2500
5 Great Deals out of 255 listings starting at $4,200
Used Toyota Tundra
440 Great Deals out of 34,876 listings starting at $1,991
Used GMC Sierra 1500
783 Great Deals out of 70,049 listings starting at $1,550

Used Cars For Sale

2010 Dodge Ram 2500 For Sale
16 Great Deals out of 298 listings starting at $7,977
2009 Dodge Ram 2500 For Sale
11 Great Deals out of 266 listings starting at $8,995
2008 Dodge Ram 2500 For Sale
19 Great Deals out of 585 listings starting at $7,995
2007 Dodge Ram 2500 For Sale
16 Great Deals out of 714 listings starting at $5,988
2006 Dodge Ram 2500 For Sale
27 Great Deals out of 1,202 listings starting at $6,295

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.