Brad251 Posted May 20, 2016 Share Posted May 20, 2016 I have an 88 SE V6 w/ manual tranny that was supposedly recently rebuilt. Since ive had it the speedo is 7-8 mph off ex: speedo says 65 my gps speed says 57-58. I'm thinking the tranny rebuild may have some thing to do with it. Also the tranny is hard to go into 1st and 2nd gear when you first start it up. Any thoughts on both? Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
Cuong Nguyen Posted May 20, 2016 Share Posted May 20, 2016 Speedo gear could be the wrong one. Are you sure the transmission is filled up properly with the correct oil? If it was rebuilt properly you wouldn't have shifting issues. Sent from my SAMSUNG-SM-N920A using Tapatalk Link to comment Share on other sites More sharing options...
V8path Posted May 20, 2016 Share Posted May 20, 2016 In the 88, the speedo gear is in the t-case. The variance could be a result of a different size tire from stock. That would be the 1st thing to check. Link to comment Share on other sites More sharing options...
Brad251 Posted May 20, 2016 Author Share Posted May 20, 2016 It has 235/75/15 which is stock size unless it came with the 31-1050s Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
V8path Posted May 21, 2016 Share Posted May 21, 2016 An SE comes with 31/10.50/15. The difference in circumference between a 31 and a 29 Inch tire is approx 6% or 5-6 mph. Your indicating a 7-8 mph difference. The added 2 mph variance may be dependent on the accuracy of your GPS and speedo. 1 Link to comment Share on other sites More sharing options...
RedPath88 Posted May 24, 2016 Share Posted May 24, 2016 SE does not mean 31's (or anything else for that matter), mine is an SE and came stock with 235/75/15's Check the info plate to be sure. Link to comment Share on other sites More sharing options...
Brad251 Posted May 26, 2016 Author Share Posted May 26, 2016 My info plate n the driver door says 235-75-15 (tire size on it now) which is why I didn't consider that as a factor. I'm pretty sure the guy I bought it from botched up the tranny rebuild and has something to do with it. Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
V8path Posted May 26, 2016 Share Posted May 26, 2016 My info plate n the driver door says 235-75-15 (tire size on it now) which is why I didn't consider that as a factor. I'm pretty sure the guy I bought it from botched up the tranny rebuild and has something to do with it. Sent from my XT1585 using Tapatalk Not sure what the logic is as to how the transmission changes the speedo reading. As far as I know, the speedo gear (in the 88 Pathfinder) is in the t-case. Even if the gears in the transmission are somehow affected/changed during your repair, its the t-case output shaft that registers the output shaft rotation to determine speed. Was the t-case taken apart during the repair? Or is this in the original t-case that came with the Pathfinder, or is it a swapped t-case that perhaps came with a speedo gear for 31" tires? Link to comment Share on other sites More sharing options...
Cuong Nguyen Posted May 27, 2016 Share Posted May 27, 2016 I was thinking along the lines the previous owner swapped the transmission and t case as a unit with another since it's easier to do than splitting. Sent from my SAMSUNG-SM-N920A using Tapatalk Link to comment Share on other sites More sharing options...
Brad251 Posted May 28, 2016 Author Share Posted May 28, 2016 Reason I said I thought tranny rebuild may have something to do with it is I got the feeling from talking to the guy I bought it from and looking under truck it wasn't the best job. But as far as I know he didn't mess with the transfer case. As far as changing the gear that regulates speed is it easy to get to? I'm guessing you buy diff one for diff size tires? Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
V8path Posted May 31, 2016 Share Posted May 31, 2016 Reason I said I thought tranny rebuild may have something to do with it is I got the feeling from talking to the guy I bought it from and looking under truck it wasn't the best job. But as far as I know he didn't mess with the transfer case. As far as changing the gear that regulates speed is it easy to get to? I'm guessing you buy diff one for diff size tires? Sent from my XT1585 using Tapatalk Hope this helps AT and MT 31s 32703-31G18 18 teeth (BLUE) AT small tires 32703-31G20 20 teeth (RED) MT 4wd 32702-33G17 17 teeth 31s AT and MT small tires 32702-33G19 19 teeth (unknown) 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now