2nd to 3rd slipping

[mopar440bbody]

hey everyone i am having a little problem with my 67 dodge i have a 440 with a 727 floor shiftier automatic . the only problem is a slight slipping when it shifts from 2nd to 3rd. and it gets worse as the motor heats up and less when the weather is cooler. the reason it started is because i had to rebuild carb and my set points needed to be re adjusted . i have a Lokar cable shiftier and that is the only thing i have messed with . i have not done anything to tranny inside or out. the slippage is very short and i think i might have the pressure set too low. it does shift at about 8 mph from 1st. 23-25 from 2nd. but its a lite shift. i also had a problem with the floor shiftier getting stuck in neutral do they need oiling or grease to have no hang ups and smooth shifting. its a B&M slap shiftier.

 

[Garys1969RR]

The high clutch in the tranny will cause that problem when it starts to go. Mine did, and it got worse as it warmed up. Make sure your bands are properly adjusted, fluid and filter are in good shape, and at the proper level. Also the kick down linkage must be properly adjusted. If it persists or gets worse, disassemble the trans and check the hi clutch.

 

[wyrmrider]

x2 the above
install a transgo reprogramming kit it's DIY friendly

 

[dvw]

Only 2 possibilities. Either low throttle pressure from cable adjustment or the high clutch is toast. Temporarilly tie the throttle pressure arm at the trans all the way to the rear. Then make some full throttle hits. It'll shift late. Does it slip? If so, trans needs to come apart. No slip? The cable isn't allowing full travel of the throttle pressure arm due to incorrect geometry or adjustment.
Doug

 

[383man]

Only 2 possibilities. Either low throttle pressure from cable adjustment or the high clutch is toast. Temporarilly tie the throttle pressure arm at the trans all the way to the rear. Then make some full throttle hits. It'll shift late. Does it slip? If so, trans needs to come apart. No slip? The cable isn't allowing full travel of the throttle pressure arm due to incorrect geometry or adjustment.
Doug

Doug is right. Also if the problem is the front clutch (some call it the high gear clutch) unit slipping from worn clutch plates if it gets bad enough see if it slips in reverse as the front clutch is also applied in reverse. But reverse runs much higher pressure so it may not be slipping in reverse if its not real bad.
Does it definetly feel like slippage (rpm flare) and not sorta like you hit the brakes real quick ? If it felt like a tap of the brake pedal then I would say it could be the second gear band and front clutch timing is off as the band needs to be released before the front clutch applies but it don't sound like that. Try backing up a slight hill and see if it slips any in reverse. Ron

 

[MOPARENT]

Could have the wrong type of fluid in there...that'll give you some slippage too..

 

[dvw]

Could have the wrong type of fluid in there...that'll give you some slippage too..

No

 

[74gtx]

Mine was doing the same thing while my linkage was improperly adjusted. I would try that first. Good luck. Mike

 

[miller]

Make sure your bands are properly adjusted

That's the first thing I'd suggest you look at.
First car a 63 SF, same problem. Bands needed adjusting.

 

[dvw]

No bands are applied in 3rd gear.
Doug

 

[miller]

Front band in second, if I understand it right. Not saying couldn't be something else, but too easy to check. It was all that was needed to fix my slipping shifts.

 

[mopar440bbody]

hey guys, i took the 67 out yesterday and i put more pressure to the tranny and no slipping . i had it to high at first 3rd was shifting at 45mph . i backed it down a bit and it shifts at 33mph a bit to high for me so i will back it down just a bit. but glad its not slipping and it shifts a lot stronger. however i still got NO PASSING gear. thanks everybody hope we see spring real soon.

 

[miller]

The cable isn't allowing full travel of the throttle pressure arm due to incorrect geometry or adjustment.

Just as dvw says. Your adjustment has to be wrong. Unless there's something internally wrong with your trans.
Maybe a little research on adjusting your cable, or describe what you have.

 

[mopar440bbody]

hey i am sure that you and dvw are right. i have a LOKAR cable that has a threaded shaft that can be moved forward or back. also it does have a bracket that move side to side. i had to remove carb spacer for clearance for air breather so that lower carb on motor thus cable and passing gear out of position. it was all working fine till removal of spacer... thanks

 

[Garys1969RR]

Under full throttle, it should shift into passing gear. My stock RR shifted from 2 to 3 at 70 MPH UNDER FULL THROTTLE. Part throttle shifts will be at a lower speed.

 

[Garys1969RR]

Another important thing to consider, is the distance from the pivot point on the carb. Too close, then you don"t get enough travel in the kickdown rod. Too far away, then you get too much travel. Most Carters have the attachment point the right distance from the throttle shaft. What carb are you running?