Cant Downshift!
06-21-2005, 12:46 AM
#1
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Car: 1991 Firebird
Transmission: T5
Axle/Gears: 3.42 w/auburn racers diff
Cant Downshift!
I just purchased a 91 firebird with TBI and a 5 spd, on the way home, i tried to downshift into 4th gear from fith, and it would not go in, i tried third still no luck, the car will only downshift into 3rd and 4th gear, after i push in the clutch and put it in 2nd gear, and then move to either fourth or third. I have no problems with the 3-2 down shift, or the 2-1 downshift, has anyone run into this problem? its really annoying when to put it into fourth gear, i have to put it in second first.
06-21-2005, 01:56 AM
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Car: '83 Berli, '84 Berli, '84 Z28 HO
Engine: L69, LG4, L69
Transmission: TH700-R4, TH700-R4, T-5
Axle/Gears: 3.08, 3.08, 3.73 Posi
i dunno for sure but perhaps there is a problem with the syncroniation betwen the 5-4-3 gears?
06-21-2005, 06:52 AM
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Car: VIN=85 T/A, CAR=82/3 T/A gfx, go figure. She's a T/A anyway!
Engine: 5.0, Holley 600 cfm 4-barrel
Transmission: THM350 ??
I'd say synchromesh problems too. My Ford Capri had trouble between 4th and 5th.
Whilst this isn't a solution, have you tried blipping the throttle whilst downshifting to equalise the shaft speeds in the gearbox? It may work and sounds great too
Mark.
Whilst this isn't a solution, have you tried blipping the throttle whilst downshifting to equalise the shaft speeds in the gearbox? It may work and sounds great too
Mark.
06-21-2005, 01:20 PM
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Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
Your problem lies in the 3/4 synchro assembly. Probable causes are a damaged sliding sleeve or damaged engagement teeth on the 3rd speed gear and/or the input shaft (4th gear).
When you put the trans in 2nd gear and then shift into either 3rd or 4th you momentarily bypass the 3/4 assembly, and then start fresh in one of those gears.
The trans needs to be disassembled, inspected, and the damaged parts replaced. Depending on the milage this might be a prime time for a rebuild too.
When you put the trans in 2nd gear and then shift into either 3rd or 4th you momentarily bypass the 3/4 assembly, and then start fresh in one of those gears.
The trans needs to be disassembled, inspected, and the damaged parts replaced. Depending on the milage this might be a prime time for a rebuild too.
06-23-2005, 08:49 PM
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Car: 1991 Firebird
Transmission: T5
Axle/Gears: 3.42 w/auburn racers diff
thanks for all your replies, i plan on pulling the transmission this winter a rebuild will definitley be in order
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