Page 1 of 2 12 LastLast
Results 1 to 10 of 15

Thread: trans rebuild and lost 4 mph and a .10?

  1. #1
    Member CRAFTSMAN
    Join Date
    Jan 2008
    Location
    racine wisconsin
    Posts
    50

    trans rebuild and lost 4 mph and a .10?

    i have a denenbear proglide with 1.80 gearset. car would not go into reverse. had it rebuild. trans builder replaced the band and had to do some machince work on the pump. dont know much about trans myself so i had a "professional" race shop do it. now the car is down on mph and about a .10. car ran 9.13 at only 143. any ideas thanks mike

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Aug 2007
    Location
    Lost Creek, WV
    Posts
    533
    You might check your band adjustment. Tighten to 72 "inch" pounds then back the screw out 3-1/2 turns.

    TS1955

  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Mar 2003
    Location
    Ohio
    Posts
    935
    Not trying to make this a stupid question but see it a lot.... did you check the trans fluid once you got things warmed up? I have seen it where guys stick fluid in and never check it after they fire the car back up.

    Did he add clutches or change anything in that manner?
    Thank you to all our sponsors:

    Racetech Race Cars
    V's House of Horse Power
    Intensity Race Products
    Vickers Transmissions
    Abruzzi Converters
    J&J Engine Diapers

  4. #4
    Senior Member SENIOR BUILDER
    Join Date
    Feb 2005
    Location
    LAWTON MI
    Posts
    113
    If he did machine work sound like he my have added more clutches. More clutches hold tighter and last longer but seem to create more drag. Also tight clutch clearances (new) will have more drag than lose ( wore out ) clutches

  5. #5
    Senior Member SENIOR BUILDER
    Join Date
    Feb 2005
    Location
    LAWTON MI
    Posts
    113
    Oops i missed the machine work was in the pump .
    But everything else still valid

  6. #6
    Member CRAFTSMAN
    Join Date
    Jan 2008
    Location
    racine wisconsin
    Posts
    50
    fluid level is good. i actually slightly overfill it than drain the overflow for the fist few passes. i thing i forgot to mention is the motor is going though the traps about 400 rpms higher than it did before. as far as cluthes and such? let i said had a shop do it. i should call and ask him.

  7. #7
    Senior Member RACING JUNKIE
    Join Date
    Mar 2003
    Location
    Ohio
    Posts
    935
    That is odd. That is something I haven't seen. If the clearances are too tight, then it should not be gaining that rpm but getting a lot of additional heat in the trans.

    When did the car lose reverse? After a burnout or found it after making a pass?
    Thank you to all our sponsors:

    Racetech Race Cars
    V's House of Horse Power
    Intensity Race Products
    Vickers Transmissions
    Abruzzi Converters
    J&J Engine Diapers

  8. #8
    Member CRAFTSMAN
    Join Date
    Jan 2008
    Location
    racine wisconsin
    Posts
    50
    was having problem for a bit i would hit transbrake and it sometimes wouldnt go back. put a fresh motor in it and broke it in on gas on the dyno. after 35 pulls on gas and 5 on alcohol, went to load car in trailer and no reverse at all. thats when i had it freshen.

  9. #9
    Senior Member RACING JUNKIE
    Join Date
    Mar 2003
    Location
    Ohio
    Posts
    935
    So you didn't run the new motor with the trans? Depending on what you changed, that potentially could explain the RPM spike and or the ET loss. You may not be missing something in the trans but very well could be missing something with the motor. You have changed a lot of things at 1 time.

    Go back to the motor 1st. Recheck your timing, recheck your valves and check the plugs for a reading if you have not done so yet.
    Thank you to all our sponsors:

    Racetech Race Cars
    V's House of Horse Power
    Intensity Race Products
    Vickers Transmissions
    Abruzzi Converters
    J&J Engine Diapers

  10. #10
    Senior Member RACING JUNKIE fla1976's Avatar
    Join Date
    Aug 2007
    Posts
    1,527
    Your converter may be going bad. Lower mph and more rpms. JMO


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Email us - Support@RacingJunk.com
Call us - 866.326.9227
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy