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hard to speed shift after replacing 5spd transmission
I have a 90 LX and replaced the original 2.3L drive train with a 5.0L drive train - trans, engine & rear end. The 5spd transmission is from a 93 mustang. I installed a new clutch cable as well.
When I shift normal, the shifter slides into the next gear smooth and without effort, but when I try to speed shift, it binds and I have to force it (jam it) into the next gear. No noise, grinding - nothing just binds to prevent a quick shift. I tried adjusting the clutch, but did not change anything. Any ideas on what I could try to eliminate the binding? Thank you |
Welcome aboard, be sure to tell us more about your car. My guess is that there is an internal transmission problem.
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The 5L appears to have been worked on, but sounds like it may have a cam installed as it does not sound stock and even with a the 273 limited slip diff. it seems to have quite a bit of power. wouldn't win any 1/4 mi races though. But it is still a lot of fun to drive.
The trans does not have any contamination (filings or cuttings in the oil) and no matter how hard I jam the shifter I can not grind the gears (indicating to me the syncros are OK) I has me stumped. But I may just have to pull it out and look inside and check the tolerances. Could it be something in the shift tower causing ? |
Welcome to cmoc!
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Welcome to CMOC.
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Originally Posted by Larry2878
(Post 203290)
The 5L appears to have been worked on, but sounds like it may have a cam installed as it does not sound stock and even with a the 273 limited slip diff. it seems to have quite a bit of power. wouldn't win any 1/4 mi races though. But it is still a lot of fun to drive.
The trans does not have any contamination (filings or cuttings in the oil) and no matter how hard I jam the shifter I can not grind the gears (indicating to me the syncros are OK) I has me stumped. But I may just have to pull it out and look inside and check the tolerances. Could it be something in the shift tower causing ? |
I was going to ask about fluid as well. T-5s can be kind of picky.
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Did you change out the fluids? Did you use ATF Dexron III/Mercon trans fluid?
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Hi - thanks for replies and questions. I double checked and yes I used ATF Dexron III, I replaced the clutch cable. I reused the firewall adjuster as it looked in good condition. Not sure if I should lift the shifter off and check it to see if it is possibly binding/hanging up when I try to speed shift. What are your thoughts?
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Originally Posted by Larry2878
(Post 204257)
Hi - thanks for replies and questions. I double checked and yes I used ATF Dexron III, I replaced the clutch cable. I reused the firewall adjuster as it looked in good condition. Not sure if I should lift the shifter off and check it to see if it is possibly binding/hanging up when I try to speed shift. What are your thoughts?
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I know remember what most guys were swapping too in regards to the fluid. GM Synchromesh Transmission Fluid.For the very reason what you are explainning.
The best transmission fluid for T-5s and Tremecs. Sycncros will work better and provides superior lubrication compared to ATF. PRODUCT # GM12345349 FEATURES -Popular for High Performance Manual Transmissions -Recommended for Tremec Transmissions -Semi-Synthetic Base Helps Withstand Extreme Temperatures -Helps to Ensure Smooth Shifts -1 Quart Bottle - Sold Individually Superior Film Strength GM Performance Synchromesh transmission fluid is recommended for all Tremec brand manual transmissions. This Synchomesh transmission fluid will make your T-5 or T-45 transmission shift smoother. Synchromesh transmission fluid prevents the thinning effects of mechanical shear for stable viscosity superior film strength and excellent anti-wear performance. Application GM Synchromesh protects against rust keeps seals soft for long life and is compatible with brass synchros for smooth synchromesh shift quality. Consult your owners manual for the correct amount of bottles needed. Fitments Ford Mustang - Recommended for all Tremec brand manual transmissions, T-5 and T-45 |
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