T56 Front shift conversion Install
Jul 27, 2011 | 08:58 PM
#21
Thanks for the compliments!
I still havent driven it too much. I got the 4.88's in and man that made this thing fun to drive! They are perfect, glad I didnt go with 4.56's. Now first is about the same as it was with the NV and 3.73's; and the close ratios make acceleration pretty nuts. I came down an on ramp and punched it and before I knew it I was up to 100, this is a whole new truck! Hitting third at 5500rpm feels awesome. Plus I can throw it in 6th and cruise at about 1800rpm at 70. I am very pleased with the results.
Not sure about gas mileage. Since its not my daily driver I dont even really keep track. I know its not good because I usually have 'fun' when I drive, but with the double overdrive Im sure it would be an improvement if you drove it nice.
I still havent driven it too much. I got the 4.88's in and man that made this thing fun to drive! They are perfect, glad I didnt go with 4.56's. Now first is about the same as it was with the NV and 3.73's; and the close ratios make acceleration pretty nuts. I came down an on ramp and punched it and before I knew it I was up to 100, this is a whole new truck! Hitting third at 5500rpm feels awesome. Plus I can throw it in 6th and cruise at about 1800rpm at 70. I am very pleased with the results.
Not sure about gas mileage. Since its not my daily driver I dont even really keep track. I know its not good because I usually have 'fun' when I drive, but with the double overdrive Im sure it would be an improvement if you drove it nice.
i got 4.88s and a true trac waiting to be installed,
ive been driving the t56 on these 3.73s for like a year and its been horrible
Feb 29, 2012 | 01:54 PM
#27
Registered User
Joined: Feb 2012
Posts: 1
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Just got done doing a front shift conversion and thought id post a problem i ran into. Before you install the new iron block supplied by Kiesler, grind the forward edge away a bit more to better match the angle that had to be cut into the shift shaft. My tranny wouldnt shift all the way into 1st, 3rd or 5th because the shifter stub interfered with the iron block and i had to die grind it back a bit on the forward top edge right above the shift shaft hole by the roll pin. Pissed me off after it was all together and i had to grind it and keep the shavings out of it.
Also the original block can be removed without cutting it to bits if you mark the shaft and shift it into a gear. Plenty of room to cut the shaft and pull the block rearward off the shaft intact if you play it right. There is absolutely no need to disassemble the tranny when its that simple!
Also the original block can be removed without cutting it to bits if you mark the shaft and shift it into a gear. Plenty of room to cut the shaft and pull the block rearward off the shaft intact if you play it right. There is absolutely no need to disassemble the tranny when its that simple!
Feb 29, 2012 | 02:36 PM
#28
Thread Starter
Launching!
iTrader: (24)
Joined: Feb 2008
Posts: 258
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From: West Des Moines, IA
I had the same problem. I couldnt get it to go into 1st, 3rd, 5th, and half the time reverse. I filed off some of the peg on the keisler unit and now it shifts like a charm. I too the offset lever out with the trans still in the truck. It took some maneuvering and it wasnt easy but it I did it. Made a custom roll pin puller that was a life saver.
