| | Slow Shift |  |
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Straighteight
Member
Age : 90
Joined : 2007-01-22
Post Count : 66
Merit : 1
| | Subject: Slow Shift Fri Jul 01, 2011 8:00 am | |
| Its a supercharged 98 and 56,000 miles since purchased, new, and occasionally under full throttle the shift from 3 to 4 is sluggish. Have changed fluid, and in 300 miles, it hasn't helped. I guess you could say it is slipping on application but then grabs hold. Any ideas? How about a firm shift additive like Lucas Stop Slip? 
Last edited by Straighteight on Fri Jul 01, 2011 12:22 pm; edited 1 time in total | |
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themanwithsauce
Enthusiast
Name : Chris
Joined : 2011-05-24
Post Count : 133
Merit : 8
| | Subject: Re: Slow Shift Fri Jul 01, 2011 9:22 am | |
| Have you replaced the trans filter? I did and it really brought my trans back to life. Even at 255k miles. It is due for a replacement around 40k miles so this should be done anyways. | |
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Straighteight
Member
Age : 90
Joined : 2007-01-22
Post Count : 66
Merit : 1
| | Subject: Re: Slow Shift Fri Jul 01, 2011 9:42 am | |
| Both oil and filter for tranny were changed 300 miles ago | |
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themanwithsauce
Enthusiast
Name : Chris
Joined : 2011-05-24
Post Count : 133
Merit : 8
| | Subject: Re: Slow Shift Fri Jul 01, 2011 1:31 pm | |
| Hmmmm....well if you're regularly goijg into 4 th then there should be enough fluid in there to prevent the rough shift. Are there any leaks? And did you add fluid since the fluid change? I've added 2 quarts to mine since the change as the fluid gets into all the spaces in the transmission. | |
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AA
Administrator
Name : Aaron
Age : 47
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18452
Merit : 252
| | Subject: Re: Slow Shift Fri Jul 01, 2011 1:35 pm | |
| Agree, first thing to check is trans fluid level on level ground with engine idling. _________________ '05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch^^^ SOLD ^^^  '70 Ninety-Eight Holiday Coupe 455cid • 116k miles^^^ SOLD ^^^ | |
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Straighteight
Member
Age : 90
Joined : 2007-01-22
Post Count : 66
Merit : 1
| | Subject: Re: Slow Shift Fri Jul 01, 2011 5:39 pm | |
| First I made sure tranny was up to operating temp by driving 23miles, highway and around town, its 90 degrees here today so I'm sure we got her hot enuff. The dipstick showed full. NO leaks either | |
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97 park ave
Addict
Name : Tyler
Age : 34
Location : MN
Joined : 2009-03-06
Post Count : 669
Merit : 21
| | Subject: Re: Slow Shift Fri Jul 01, 2011 6:15 pm | |
| The 4th clutch in the 4t65 transmissions are notoriously weak, dump some lucas in and see what it does but it might be too late. | |
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Jason
Aficionado
Name : Jason
Age : 41
Location : Comox, BC, Canada
Joined : 2007-01-23
Post Count : 1378
Merit : 66
| | Subject: Re: Slow Shift Sat Jul 02, 2011 10:37 pm | |
| I`ll have to confirm once I get home and access the .bin but isn't the full throttle (WOT) shift point for 3-4 > 120 mph ?
Are you only getting this issue at WOT, or are you getting the symptoms at part throttle as well ? | |
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AA
Administrator
Name : Aaron
Age : 47
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18452
Merit : 252
| | Subject: Re: Slow Shift Sun Jul 03, 2011 12:42 am | |
| 3-4 shift @ WOT = 124 mph
Maybe he means the 2-3 shift? _________________ '05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch^^^ SOLD ^^^ '70 Ninety-Eight Holiday Coupe 455cid • 116k miles^^^ SOLD ^^^ | |
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Straighteight
Member
Age : 90
Joined : 2007-01-22
Post Count : 66
Merit : 1
| | Subject: Re: Slow Shift Sun Jul 03, 2011 7:04 am | |
| As they used to say "You're right, Give that man an RG Dunn". It was an ad for a cigar company, 'way back in the dark ages.
It was on the outskirts of town about mid day, couldn't have been 3-4, not at full throttle. I was accelerating pretty quickly, and may have let up on the throttle quite a bit earlier than 124 mph. | |
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