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Engine Specific Info and Questions => IDI Engine => Topic started by: rabbit_diesel on October 19, 2007, 02:45:34 pm

Title: Transmission gear ratio difference?
Post by: rabbit_diesel on October 19, 2007, 02:45:34 pm
What would the gear ratio be like if I put a 1.6 N/A diesel tranny onto a 1.8 gas engine? How would it behaive, would it be geared down or up? I just don't like driving an auto, and plus it gets worse gas mileage.
Title: Transmission gear ratio difference?
Post by: jtanguay on October 19, 2007, 05:02:09 pm
diesel tranny on a 1.8 gas engine.  well since its the n/a diesel, it should be on par with the 1.8 tranny.  then again, anything is better than an auto box!!!!! they are horrible on the highway.  3500 rpm @ 100km/h?  :shock:

but driving around town is cool with the auto box. no matter how hard i drove that thing it wouldn't die... shifts @ 7k rpm etc.  2nd gear was USELESS lol  tranny still worked, and engine had serious blowby (air filter was SOAKED)  :lol: still ran, but body was shiite
Title: Transmission gear ratio difference?
Post by: bmatthis1 on October 20, 2007, 12:32:52 pm
Look underneath the car next to oil pan on the bottom of the bellhousing of the tranny.  There should be a little flat pad machined into the aluminum there with a transmission code stamped into it.  Check this code and then go over to Roger's Caddy Shack site.

http://www.4crawler.com/VWpickup.shtml

He has a table there with all of the tranny codes on it and their accompanying gear ratios and most prevelant years and models of use.
Title: Transmission gear ratio difference?
Post by: rabbitman on October 23, 2007, 02:47:55 pm
Hello, my rabbit has a FN 5-speed, the rpm in 5th is 500rpm lower than a '86 golf 1.8 with a 5-speed
Title: Transmission gear ratio difference?
Post by: rabbit_diesel on October 23, 2007, 06:27:50 pm
Ya, fortunately, I think mine is going to be lower rpm's than the original one too. I am very relieved of it 8) .  It will have better mpg's too!