mack4ever Posted June 16, 2010 Share Posted June 16, 2010 hello guys.my r600 has a trd720 transmission.i have a spare one but that`s a trd7220.can anyone tell the difference between the transmissions and can i use the trd7220 in my r600?thanks. leon mack4ever. Quote Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/ Share on other sites More sharing options...
mack4ever Posted June 20, 2010 Author Share Posted June 20, 2010 hello.they look almoost the same on the outesite but i don`t know the difference in the numbers. Quote Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57794 Share on other sites More sharing options...
Rob Posted June 20, 2010 Share Posted June 20, 2010 hello.they look almoost the same on the outesite but i don`t know the difference in the numbers.Hi Leon, I'm not absolutely positive but I think the 7220 series is double overdrive where you original is a single overdrive. Exterior dimensions are the same and it will fit your truck.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/14407-transmission/#findComment-57795 Share on other sites More sharing options...
mack4ever Posted June 20, 2010 Author Share Posted June 20, 2010 thank you rob.the transmision in my r has the parking brake on the aux shaft and the ather one dosn`t.so i have to take them both appart to change that.but first i have to look if the spare transmision is good.i will take the covers of and see if i can find anything odd.leon. (mack4ever) Quote Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57797 Share on other sites More sharing options...
Rob Posted June 20, 2010 Share Posted June 20, 2010 thank you rob.the transmision in my r has the parking brake on the aux shaft and the ather one dosn`t.so i have to take them both appart to change that.but first i have to look if the spare transmision is good.i will take the covers of and see if i can find anything odd.leon. (mack4ever)Hi Leon, if you have spring brakes I wouldn't swap over the brake drum parking brake. If you don't have spring parking brakes I would seriously look to install them. No particular reason other than they are much better at holding the truck anchored in position.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/14407-transmission/#findComment-57799 Share on other sites More sharing options...
mack4ever Posted June 20, 2010 Author Share Posted June 20, 2010 hey Rob.my truck dosn`t have spring breakes.the drum break holds the tracter well but i didn`t had a trailer on it yet.i did buy a trailer that weights about 9000 kilo`s,so i don`t know if the parking break can hold that weight.so maybe i have to put sringbrakes on it.leon. Quote Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57803 Share on other sites More sharing options...
Rob Posted June 20, 2010 Share Posted June 20, 2010 hey Rob.my truck dosn`t have spring breakes.the drum break holds the tracter well but i didn`t had a trailer on it yet.i did buy a trailer that weights about 9000 kilo`s,so i don`t know if the parking break can hold that weight.so maybe i have to put sringbrakes on it.leon.Hi Leon, that is a very heavy trailer, about 19,900 pounds!! There are 454 grams in a pound so when the math is done, 9000,000 grams divided by 454 grams equals 19,823.79 pounds!! I would definately look into spring brakes for the tractor. 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/14407-transmission/#findComment-57804 Share on other sites More sharing options...
mack4ever Posted June 20, 2010 Author Share Posted June 20, 2010 first i have to fix up the trailer so i can try if the parkingbreak holds thr weight.it`s a lowboy goosenek trailer.i want to put a mack on it so that weight comes to it.so i think the brake will not hold that weight.leon. Quote Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57806 Share on other sites More sharing options...
mack4ever Posted June 20, 2010 Author Share Posted June 20, 2010 http://www.youtube.com/watch?v=4YEKSgvi1EIa video of a trailer.it`s almost the same as mine.mine can`t be made longer but the rest is the same.leon Quote Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57813 Share on other sites More sharing options...
Rob Posted June 20, 2010 Share Posted June 20, 2010 http://www.youtube.c...h?v=4YEKSgvi1EIa video of a trailer.it`s almost the same as mine.mine can`t be made longer but the rest is the same.leonLot's of meat there. Looks like a nice trailer.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/14407-transmission/#findComment-57817 Share on other sites More sharing options...
mack4ever Posted June 20, 2010 Author Share Posted June 20, 2010 hi Rob.thank you.it`s a nice trailer but it needs a lot of work to pass inspection here in the netherlands.it needs a lot of welding new peaces in it.but a few more kilo`s don`t mind.i wil take some photo`s of it so you can see how it looks now.leon Quote Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57819 Share on other sites More sharing options...
HK Trucking Posted June 20, 2010 Share Posted June 20, 2010 Lot's of meat there. Looks like a nice trailer.RobThe TRD720 and the TRD7220 are both double overdrive duplex transmissions.The "0" after the 72 or 722 denotes that.A TRD72 or TRD722 would be single overdrive (o.d. in the compound only).The 720 had more o.d. in 5th gear than the 7220. The 720 is an older transmission, the 7220 a later model one, relatively speaking.Regarding the spring brakes, it's not just a matter of holding the tractor stationary when parked, it's also a matter of being able to make an emergency stop if you lose all your air pressure suddenly. The little drum brake on the transmission is worthless in that scenario.. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57820 Share on other sites More sharing options...
mack4ever Posted June 20, 2010 Author Share Posted June 20, 2010 thanks hk.the topspeed of my r600 is 105 kilometers at 2100 reps.is it the same with the trd7220 ?leon. Quote Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57822 Share on other sites More sharing options...
HK Trucking Posted June 20, 2010 Share Posted June 20, 2010 With a 7220 the top speed at 2100 will be a little slower due to slightly less overdrive in 5th gear.I don't have the exact transmission ratios in front of me right now, or I could calculate an exact speed depending on your tire size and rear axle ratio.. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57823 Share on other sites More sharing options...
mack4ever Posted June 20, 2010 Author Share Posted June 20, 2010 thank you.i will see if i can use that transmision ore use my own.leon. Quote Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-57824 Share on other sites More sharing options...
truckboy Posted July 16, 2010 Share Posted July 16, 2010 Have they statred making large trucks like Kenworth, Mack, and Peterbilt equipped with automatic transmissions? Quote Mack trucks | Cheap used cars Link to comment https://www.bigmacktrucks.com/topic/14407-transmission/#findComment-59669 Share on other sites More sharing options...
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