ejw71 Posted February 23, 2021 Share Posted February 23, 2021 In changing rear gear ratios (to 3.42) the 350TH trans output shaft drive gear and the speedometer driven gear also required a change to have speedometer read correctly. These gears are color coded for teeth count. So, what color gear/teeth count do I need? Thanks, Ed Wieder, ejw71 Quote Link to comment Share on other sites More sharing options...
MC1of80 Posted February 23, 2021 Share Posted February 23, 2021 Go to the TCI speedometer calculator on their site, put in your info and it will tell you what you need. 3 Quote Link to comment Share on other sites More sharing options...
ejw71 Posted February 27, 2021 Author Share Posted February 27, 2021 Tks for info but it didn't work. Ed Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted February 27, 2021 Share Posted February 27, 2021 Ed, I haven't noticed you on the boards in awhile. Glad to see you posting. rob Quote Link to comment Share on other sites More sharing options...
MC1of80 Posted February 27, 2021 Share Posted February 27, 2021 Google speedometer gear calculator and a bunch of sites, including TCI's will pop up. Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted February 27, 2021 Share Posted February 27, 2021 Just a thought and maybe this has gone into the calculation along with your gear ratio change are you also taking into consideration oversized tires? rob Quote Link to comment Share on other sites More sharing options...
MC1of80 Posted February 27, 2021 Share Posted February 27, 2021 Rob, that's why he has to go on to the site for himself. To put in all his parameters to get the correct answer. Quote Link to comment Share on other sites More sharing options...
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