Thread: Milzy Motorsports 4t65EHD Transmission

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  1. #1 Milzy Motorsports 4t65EHD Transmission 
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    Hello everyone! I own a built 2004 Pontiac Grand Prix GTP Comp G (intercooler, S3X cam, 2.8 pulley) and my transmission is struggling so I am looking into my options for building the trans. Does anyone have any experience with or knowledge about Milzy Motorsports? They do transmission builds and are priced similarly to TEP. I am aware that Dave at TripleEdgePerformance is the guy to go to, however he's also very busy and it will take longer going that route. I will post a link below to Milzy Motorsports website. Any help or advice would be greatly appreciated!!!

    Milzy Motorsports 4t65eHD Transmission - Milzy Motorsports
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  3. #2 Re: Milzy Motorsports 4t65EHD Transmission 
    GrandPrix Junkie SgtMarshal's Avatar
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    I haven't heard good things about milzy lately. maybe back in the day they were reputable, but I wouldn't consider them anymore.
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  4. #3 Re: Milzy Motorsports 4t65EHD Transmission 
    GXP Level Member GTPpower's Avatar
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    It will take forever to get it done through Milzy, if it ever does.

    I know Dave is really busy. Other options; Nicholls Perfomance Transmission, or Harmon Performance Transmission.

    Both of those guys do great work and usually have quick turn-around time.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2001 GTP Drag Car - XPZ, Tischler heads, NB intercooler, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
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  5. #4 Re: Milzy Motorsports 4t65EHD Transmission 
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    cool thank you guys. Any other recommendations or advice with building the trans? Thanks.
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  6. #5 Re: Milzy Motorsports 4t65EHD Transmission 
    GXP Level Member GTPpower's Avatar
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    Use gxp chains. Don't let someone talk you into a 7/8" chain.

    The sonnex billet 3rd is also a great upgrade.

    I also wouldn't mess around with a 4340 input shaft at your power level. Go right to the 300m.
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  7. #6 Re: Milzy Motorsports 4t65EHD Transmission 
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    Iíve decided to go with TEP. Not messing around with Milzy. One more question about the trans build... should I stick with my 3.29 gear ratio or use 2.93s?
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  8. #7 Re: Milzy Motorsports 4t65EHD Transmission 
    GXP Level Member GTPpower's Avatar
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    I would go to 3.29.
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  9. #8 Re: Milzy Motorsports 4t65EHD Transmission 
    GrandPrix Junkie SgtMarshal's Avatar
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    I heard TEP wasn't taking any new customers. You could verify this for us if you want. there are other trans builders out there, I think GTPpower mentioned a few.
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  10. #9 Re: Milzy Motorsports 4t65EHD Transmission 
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    If I decide to go with the 3.29s, what stall would you guys recommend? Iíll hopefully be getting the HPS4 which includes a new torque converter. And wouldnít the 2.93 gears be easier on the chain? Not to mention get better gas mileage? These cars already spin pretty hard down low so Iím trying to figure out which gear ratio would be best...
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  11. #10 Re: Milzy Motorsports 4t65EHD Transmission 
    GXP Level Member GTPpower's Avatar
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    With an m90 car, you want as low of a stall as possible, regardless of gears. Stock works well.

    With gxp chains, you won't have to worry about wear on your setup, so any gears are fine. You will lose a mpg or two with 3.29's and it will be more difficult to launch if you don't have sticky tires.
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  12. #11 Re: Milzy Motorsports 4t65EHD Transmission 
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    Thanks for the reply. I planned on keeping the stall either stock or slightly above that. Iím still undecided about the gears, and Iím not worried that much about gas mileage... but I do want whichever would be better for 1/4 mile times. It will be going to the track about once a season when itís all done.
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  13. #12 Re: Milzy Motorsports 4t65EHD Transmission 
    GXP Level Member GTPpower's Avatar
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    3.69's would be best for 1/4 mile times. Hopefully you have slicks though.
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  14. #13 Re: Milzy Motorsports 4t65EHD Transmission 
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    No slicks. Iíll probably just be running it on street tires.
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  15. #14 Re: Milzy Motorsports 4t65EHD Transmission 
    GXP Level Member GTPpower's Avatar
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    I'm not sure what to tell you then. It's going to be spin city no matter what gears you pick then.
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  16. #15 Re: Milzy Motorsports 4t65EHD Transmission 
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    you should get some drag radials at least. trick is to do a hell of a burn out with dr's, with a real good burn out even my st tires stick pretty good. my set up it will spin like butter if im to hard onto the throttle off the line. the starting line is the whole race really. getting off clean and fast as you can with out breaking the tires free. its a fine line in a fwd car.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  17. #16 Re: Milzy Motorsports 4t65EHD Transmission 
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    Yeah I know it will take some practice getting it to launch with the right amount of throttle so that it wonít spin. Any details on your set up? Iím considering the 3.29s with 2800 stall.
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  18. #17 Re: Milzy Motorsports 4t65EHD Transmission 
    Killa Bee Scottydoggs's Avatar
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    im on a stock gear for a hd tranny and stock TC for a l67.

    i can foot break it to about 1800 ish rpm, when the last yellow comes on i let the brake go and just ease into it till about 15 20 mph, its by feel when you can floor it. but my scan show me got in wot about that speed. every time you go to the track its a bit different too, air temp, track temp, how well they prep the track that day. all sorts of factors.

    street tires i drop to 21 psi too. as well as when i run my dr's. those i run at 20.

    this was my best run with the gen 3, 2.8 and meth. you can hear it getting eased into and nailed pretty much. all my other vids you can hear the tires talking, not big smoking the tires spinning, but like a stuck pig, on the edge of traction lol need to fix a oil leak and get it back to the track to see what the gen 5 blower and n* did for it.


    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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