what gears do i have?

[ca1a73]

I jacked the back end of my bronco up. spun one tire until i got one full turn on my driveshaft. I don't even think i got one full rotation on my tire, before i got one rotation on the driveshaft. Is this right? Doesn't sound right to me. If it is, what do i have for gears?

 

[John Holden]

you got it backwards. You have to turn the driveshaft until the tires have rotated one full turn. It is best to mark a tire and line it up against something stationary to be as accurate as possible. Count how many times the driveshaft has turned and that's your gear ratio.

 

[Madgyver]

leave truck on all fours, Tape the end of a string about 2 feet long to the bottom of the driveshaft, put in neutral, Push truck forward so that tires makes one full rotation, Count the wraps of string on driveshaft. 3 1/2 wraps = 3.50, 4 1/4 wraps = 4.11, 4 1/2 wraps = 4.56

 

[77BroncoWag]

[quote author=madgyver link=board=5;threadid=16394;start=0#msg124763 date=1050378076]
leave truck on all fours, Tape the end of a string about 2 feet long to the bottom of the driveshaft, put in neutral, Push truck forward so that tires makes one full rotation, Count the wraps of string on driveshaft. 3 1/2 wraps = 3.50, 4 1/4 wraps = 4.11, 4 1/2 wraps = 4.56
[/quote]

too easy guess that is why you are a BG(bronco god) ;D

 

[ca1a73]

thanks guys, i was thinking that after i posted it...lol

 

[chuck]

[quote author=madgyver link=board=5;threadid=16394;start=0#msg124763 date=1050378076]
leave truck on all fours, Tape the end of a string about 2 feet long to the bottom of the driveshaft, put in neutral, Push truck forward so that tires makes one full rotation, Count the wraps of string on driveshaft. 3 1/2 wraps = 3.50, 4 1/4 wraps = 4.11, 4 1/2 wraps = 4.56
[/quote]
There is other ways to find the ratio but I have not come across a simpler way. Good job madgyver, the name is on target.

 

[ca1a73]

well, i just did the gear check, 3 1/2 turns....must be 3:50. Not so good for 33" no wonder why im reving but not going...lol.....and i was going to go to 35" won't be moving at all. How much to change gears? and how big of a job is it?

 

[Broncobowsher]

[quote author=madgyver link=board=5;threadid=16394;start=0#msg124763 date=1050378076]
leave truck on all fours, Tape the end of a string about 2 feet long to the bottom of the driveshaft, put in neutral, Push truck forward so that tires makes one full rotation, Count the wraps of string on driveshaft. 3 1/2 wraps = 3.50, 4 1/4 wraps = 4.11, 4 1/2 wraps = 4.56
[/quote]

I am so glad someone remembers all that preaching I did so long ago. I might just shead a tear :'(. Nice to know people are listening ;D Someday I might even do a tech article on it

 

[Madgyver]

[quote author=Broncobowsher link=board=5;threadid=16394;start=0#msg124969 date=1050450185]I am so glad someone remembers all that preaching I did so long ago. I might just shead a tear :'(. [/quote]

Yeah right!!