T45-RS Conversion for LS Engine?
Thread Starter
Instructor
Joined: Dec 2012
Posts: 155
Likes: 5
From: Illinois
T45-RS Conversion for LS Engine?
Four years ago, I bought one of Keisler's T45-RS transmissions and put it in my 1970 Corvette, which had a replacement 350 cubic inch engine in it at the time. It was their 26 spline input shaft version, and came with mechanical speed output. Now, I'm having an LS3 put in and need to convert it to electrical speed output, so it can communicate with the LS3 computer. The problem is that this specific transmission doesn't have a standard speedo mounting boss. Also, the cable can't be removed from the transmission without it's own special gear coming out of the transmission with it.
Of course, Keisler just went bankrupt, so they're no help. Has anyone else converted this specific transmission for an LSx swap? If so, how did you do it and where did you get the conversion kit?
Of course, Keisler just went bankrupt, so they're no help. Has anyone else converted this specific transmission for an LSx swap? If so, how did you do it and where did you get the conversion kit?
Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
If the speedo cable output can be unscrewed from the speedo, you can add a Dakota Digital pass thru VSS and short cable to the speedo.
I've also added a VSS to a T10 by using the reverse gear as a reluctor.
JTR has a diff mounted VSS reluctor and sensor. Might be tight considering the way the diff pinion is mounted on a vette. You might be able to adapt to one of the side yokes.
Keep in mind the 2 wire sensor just needs ferrous metal passing by. You could add metal tabs on the driveshaft and use that as a reluctor.
The sensors need a minimum AC output for the ecu to read. That voltage is controlled generally by the size of the sensor, distance to the reluctor, and rotational spped of reluctor. If it's not reading, you just move the sensor closer to the reluctor but both have to be mounted at a pretty consistent distance.
I've also added a VSS to a T10 by using the reverse gear as a reluctor.
JTR has a diff mounted VSS reluctor and sensor. Might be tight considering the way the diff pinion is mounted on a vette. You might be able to adapt to one of the side yokes.
Keep in mind the 2 wire sensor just needs ferrous metal passing by. You could add metal tabs on the driveshaft and use that as a reluctor.
The sensors need a minimum AC output for the ecu to read. That voltage is controlled generally by the size of the sensor, distance to the reluctor, and rotational spped of reluctor. If it's not reading, you just move the sensor closer to the reluctor but both have to be mounted at a pretty consistent distance.
Four years ago, I bought one of Keisler's T45-RS transmissions and put it in my 1970 Corvette, which had a replacement 350 cubic inch engine in it at the time. It was their 26 spline input shaft version, and came with mechanical speed output. Now, I'm having an LS3 put in and need to convert it to electrical speed output, so it can communicate with the LS3 computer. The problem is that this specific transmission doesn't have a standard speedo mounting boss. Also, the cable can't be removed from the transmission without it's own special gear coming out of the transmission with it.
Of course, Keisler just went bankrupt, so they're no help. Has anyone else converted this specific transmission for an LSx swap? If so, how did you do it and where did you get the conversion kit?
Of course, Keisler just went bankrupt, so they're no help. Has anyone else converted this specific transmission for an LSx swap? If so, how did you do it and where did you get the conversion kit?
