Calibrating tire size with pulsar LT

[NavyChief]

Just put on 35x12.5x18 ridge grapplers on the trail boss and my speedometer is out of wack. Anyone savvy enough to reprogram with the pulsar LT? I had the original tire size before

 

[Leoleal]

the pulsar instructions can be confusing. Read it from start to finish and you will get it. Remember to measure the tires as 35's are usually about 34.3 or .5

 

[Big Rob]

here's a screenshot from the instruction booklet.

 

[Keller]

https://documents.rangetechnology.com/pulsar_lt_manual.pdf

 

[NavyChief]

So with the stock 275/65/18 will get inputted 32.1 and the 35s will be 35.0?? If that’s the case my speedometer is way faster.

 

[NavyChief]

Well I called range tech and they said to manipulate the numbers so I guess it doesn’t matter what size you put on. Just match the odometer to Waze gps speed or a radar detector.

 

[CthulhuTrailBoss]

Just installed my LT Pulsar for my 5.3l Trail Boss. Trying to change tire size but when I select 30mph (the setting for tire size change) the speedometer flashes to 140 but stays there. It does not come back down to allow me to enter the stock tire size. It just freezes at 140.

All the other tuning settings work great except the gaht damn tire size setting. Anyone else have or had this problem with their Pulsar?

 

[NavyChief]

It stays stuck on the 140? It should sweep back down. Call range tech and let them know.

 

[CthulhuTrailBoss]

It stays stuck on the 140? It should sweep back down. Call range tech and let them know.

Yup. It’s the only option that does it. All the other (10, 20, 40, etc) worked just fine. Only the tire size feature glitches and freezes at 140mph.

And yeah, that’s what it’s looking like I’ll be doing tomorrow: calling them. Can’t find anything on the internet about it glitching/freezing.