Lmackattack Posted August 7, 2009 Share Posted August 7, 2009 looking at a 94 RD690 has a EM300. the stick has that silver ring simmilar to the air shift 6 speeds but just says hi and low?what could it be? Quote Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/ Share on other sites More sharing options...
bts-4120 Posted August 7, 2009 Share Posted August 7, 2009 be a t-2060 or 2070 most of them in chicagoland was speced with one of those trans, to be sure it would be stamped in the driver side of the trans. Quote Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38804 Share on other sites More sharing options...
storkmack Posted August 7, 2009 Share Posted August 7, 2009 My bet would be T-2060 or T-2070. Brad Quote Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38816 Share on other sites More sharing options...
usmcjimbo Posted August 7, 2009 Share Posted August 7, 2009 I would agree, either a t2060 or T2070 Quote Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38820 Share on other sites More sharing options...
Lmackattack Posted August 7, 2009 Author Share Posted August 7, 2009 this is the vin number if anyone has time to run it and see . if you can let me know what rears are in it. This truck had a wierd tag over the normal stamping aera.Thanks in advance..1m2p264y5rm015977 Quote Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38822 Share on other sites More sharing options...
Lmackattack Posted August 7, 2009 Author Share Posted August 7, 2009 got the info ...T2060 with 5.88 rears.. What do you think will this have a faster 2nd gear than the old 2 stick 6 speed? I think the t2060 has a 5.25 in 2nd low and 3.05 in 2nd high? Quote Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38827 Share on other sites More sharing options...
bts-4120 Posted August 8, 2009 Share Posted August 8, 2009 got the info ...T2060 with 5.88 rears.. What do you think will this have a faster 2nd gear than the old 2 stick 6 speed? I think the t2060 has a 5.25 in 2nd low and 3.05 in 2nd high?yes 2 sticks have a 4.99 in 2nd direct and 8.20 in 2nd lo if its a 1071 it will be 13.42 in 2nd lo lo with those 5.88 in most situations you will only need low range for reverse truck should top out around 65mph though Quote Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38855 Share on other sites More sharing options...
HK Trucking Posted August 8, 2009 Share Posted August 8, 2009 yes 2 sticks have a 4.99 in 2nd direct and 8.20 in 2nd lo if its a 1071 it will be 13.42 in 2nd lo lo with those 5.88 in most situations you will only need low range for reverse truck should top out around 65mph thoughA 2 stick 6 speed (TRXL107, 1071) is direct in hi gear and is usually used with 4.17 rears when using 11R22.5 rubber, for a top speed around 60 - 62 MPH @ 2100 RPM.The T 2060 2070 & 2080 have a .60 overdrive in hi gear. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38857 Share on other sites More sharing options...
Rob Posted August 8, 2009 Share Posted August 8, 2009 What is an RD690? I've seen the term a lot but not well versed on the newer stuff.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38859 Share on other sites More sharing options...
David Posted August 8, 2009 Share Posted August 8, 2009 My engine list doesn't show the "90". But the production list shows 9815 of them built between '83 and '89. Quote Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38862 Share on other sites More sharing options...
HK Trucking Posted August 8, 2009 Share Posted August 8, 2009 An RD 690 would have an EM7 - 300 with a T2060 or 2070 or 2080. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38863 Share on other sites More sharing options...
HK Trucking Posted August 8, 2009 Share Posted August 8, 2009 I found this pic in the gallery.The RD 690 would have this type of hood.This particular one is a tractor though, so it may be an RD688 (equipped with Econodyne E7 350 or 400 etc.) Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38864 Share on other sites More sharing options...
Rob Posted August 8, 2009 Share Posted August 8, 2009 I've seen plenty of those around but have never worked on one. I suppose the R690 has the more standard hood of the R model then?Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38866 Share on other sites More sharing options...
HK Trucking Posted August 8, 2009 Share Posted August 8, 2009 I've seen plenty of those around but have never worked on one. I suppose the R690 has the more standard hood of the R model then?RobI don't think they made an R690, as the plain R models were discontinued in the late 80's, and the EM7 300 wasn't introduced until about 1990. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38869 Share on other sites More sharing options...
bts-4120 Posted August 8, 2009 Share Posted August 8, 2009 A 2 stick 6 speed (TRXL107, 1071) is direct in hi gear and is usually used with 4.17 rears when using 11R22.5 rubber, for a top speed around 60 - 62 MPH @ 2100 RPM.The T 2060 2070 & 2080 have a .60 overdrive in hi gear.should have made my post longer, what I was getting at is the t-2060 is geared taller in 2nd vs the old 2-sticks, that truck with 5.88 still will run down the road at 65 one with 6.06's would still be as fast an old 2 stick as far as road speed. as far as the RD part of the truck it refers to the type of frame 3/8" thick 10.5" tall I had a 79RD once you can put the newer style hood on a old R radiator would have to swaped Quote Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38870 Share on other sites More sharing options...
HK Trucking Posted August 8, 2009 Share Posted August 8, 2009 as far as the RD part of the truck it refers to the type of frame 3/8" thick 10.5" tall I had a 79RD once you can put the newer style hood on a old R radiator would have to swapedYou are correct, but Rob was asking what an RD690 is, so I posted that photo.The older RD685, 686 etc. had the regular R model hood from the factory. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/10259-what-trans-could-it-be/#findComment-38871 Share on other sites More sharing options...
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