If I swap 35 and 25 (a&b) would I hurt anything on my MT

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, and others.
98cruiser

98cruiser

Well-Known Member
Messages
85
Reaction score
0
I want to go fast more upstairs, some one told me to swap the 35 with 25 a & b gearing, is that going to do any damage or should I go with 30 and 25
 
The total teeth count for a and b gears is 60 weather its 30 30 or 29 31 they need to total 60 or youll destroy the gears right away, as for running 35a & 25b thats pretty tall gearing your motor will take too long to get up to speed might try 31a $ 29b
 
i tryed it once. its way too much. you will smoke the clutch pretty quick. 29/31 is a pretty good balance.and if you want a little more swap those 31/29
 
Pistol pete's right I even smoked the clutch with 31 29 gears going up a small hill, is it possible to get a hd cluch like an elco and run 35, 25 gearing???
 
RampageHopUps said:
MCD gears are available in 33/27 as well.
Click to expand...
I run 35/25 and my clutch is fine, it produces a good top speed, not acceleration. I also swapped to 25/35 and it has more acceleration off the line but no top end.


I think 25/35 would hurt the motor more than 35/25; just my 2-cents...


Rob,


Do you have these gears?
 
Last edited by a moderator:
prostock said:
I run 35/25 and my clutch is fine, it produces a good top speed, not acceleration. I also swapped to 25/35 and it has more acceleration off the line but no top end.
I think 25/35 would hurt the motor more than 35/25; just my 2-cents...


Rob,


Do you have these gears?
Click to expand...
are you running mt or tt tires?
 
chevy said:
Pistol pete's right I even smoked the clutch with 31 29 gears going up a small hill, is it possible to get a hd cluch like an elco and run 35, 25 gearing???
Click to expand...
its possible but they will still wear right out too. its like trying to take off in 3rd gear in a car. i run 30/30 mcd gears in my stock mt pro and it is plenty fast. its close to my tmaxxs top speed 40-45
 
Yeah iIrun the stock mt wheels probably the heaviest set of 5th scale wheels I come across Im gonna try the 30 30 set that seems like a good combination of torque and speed, with the mt wheels 31 29 takes too long to get up to speed and the 29 31 was a tiny bit slow for me. :)
 
I had a MT with MT tires on it that some one swapped the main gears on and all that stock motor could do was smoke the clutch!


On my TT I took my stock 29,31 and swapped them 31,29 for more speed. I have a ported, built, 27.2 on buggy bow ties. It goes 43mph! Much larger MT tires with 31,29 would be good for about 60mph if you motor/clutch could handle it, but I don't think thats possible. The MT tires are at least 133% larger without accounting for expansion at speed!
 
Last edited by a moderator:
hamster huey said:
I had a MT with MT tires on it that some one swapped the main gears on and all that stock motor could do was smoke the clutch!
On my TT I took my stock 29,31 and swapped them 31,29 for more speed. I have a ported, built, 27.2 on buggy bow ties. It goes 43mph! Much larger MT tires with 31,29 would be good for about 60mph if you motor/clutch could handle it, but I don't think thats possible. The MT tires are at least 133% larger without accounting for expansion at speed!
Click to expand...
your engine must be making alot more rpm than a stocker because i run those gears in my mt and don't come close to 60 with it topped out. im closer to 40-45. that makes me want to put a ported top end on my truck
 
It prob makes more RPM but not much more. Im getting 43mph with buggy tires and swapped 29,31. Adding large diameter MT tires keeping the same swapped 29,31 would go way way faster seeing how the tires are around 133% larger w/o even accounting for tire expansion.


The prob is MT tires and high speed gearing is very hard on the clutch and engine. Those high speed gears would take some serious power and a good clutch to get the engine up to top RPM. I wonder if a ported 28.5 could do it? I bet a 30.5 could but could it w/o breaking the drivetrain?


Your making me want to turn my next project into top speed! I bet the best bet would be buggy tires and some high speed gears................
 
...a Real top speed project would need strapped down suspension, really sticky street tires, elcon clutch, Demon belt drive...lol:rolleyes:


.
 
hamster huey said:
It prob makes more RPM but not much more. Im getting 43mph with buggy tires and swapped 29,31. Adding large diameter MT tires keeping the same swapped 29,31 would go way way faster seeing how the tires are around 133% larger w/o even accounting for tire expansion.
The prob is MT tires and high speed gearing is very hard on the clutch and engine. Those high speed gears would take some serious power and a good clutch to get the engine up to top RPM. I wonder if a ported 28.5 could do it? I bet a 30.5 could but could it w/o breaking the drivetrain?


Your making me want to turn my next project into top speed! I bet the best bet would be buggy tires and some high speed gears................
Click to expand...
i have no problem getting it to top out with the stock 30cc it really doesn't lag either. i was climbing 4-5 foot snow hills with it today from a dead stop to the top no problem with the 29/31/25/25. its a lot of fun in the snow it goes over anything. i posted a long time ago about building a 60 mph tt. i wanted to know what it would take. sounds like a good challenge for your p2w
 
yes, it is alright in a flat parking lot but it starts getting sluggish on the take off. 29/31 is the best balance of top end and take off for me. then if i run at a large parking lot where im not stopping or slowing down much ill put in a set of 30/30s. anything over that seems to bog my truck down alot.
 
Back
Top