What's the deal? I've seen Line Mod transmission kits for prices ranging from 20.00 to 90.00. Why such a price difference? Even the 20 dollar one is steel. can someone please help me out? No tuner or vendor names please.

 

Size does matter:

Stock - .375"
Sonnax - .427"
Diablo (Medium) - .438"
Diablo (Firm) - .500"
JDM Engineering - .500"

 

So size of the valve is the reason for the pricing? I don't get it. Are they gold or platinum plated? Especially one. Being good doesn't mean you use that to charge the highest price. I know all these tuners are good. I just don't see why one is so much more than another for what appears to me to be an equivalent product. What do the size differences do? BTW, thanks for the response.

 

FLASH not FLA. =)

Larger diameter equates to more pressure, harder shifts.

 

Okay, I'll buy that the larger diameter valves equal firmer or harder shifting, but are all these valves designed to alleviate the side loading of pressure like the Sonnax?

Side loading is when you give it moderate gas and then let off for the corner and BAM it hits the next gear with a ton of pressure. May not be too hard on the tranny, but I'll guarantee you the driveshaft and pinion bearings are screaming Help!

Any line mod valve vendors care to answer this question?

 

None of the other ones (besides Sonnax) addresses the side loading, Sonnax is the only one I know of that machines the grooves with a slight rounding (I do the same on mine). Another thing to consider is that the VALVE in all of them I think is steel, the SLEEVE in some is aluminum, the cycleing of the steel valve in the aluminum sleeve causes uneven wear that will eventually result in a leaky valve, and you have the same problem you started out to correct.

G

 

some good info

http://www.diablosport.com/fordvalve.html

 

Factory_Tech,

Thanks for the info. Even though I don't plan on racing the L at a track, I want the best performance from m tranny. I am not just going to replace the valve, I am going to get the modified body. Other than oil and filter changes, I would rather not have to fiddle around in the tranny any more than necessary.

If I do the valve body and a bigger pan, I figure this bone stocker will make me happy for quite a long time.

PS: I had a car in 1964 with a Cal-Hydro in it. A '62 Ford Galaxie 500 with a 427 w/tri-power. When it shifted from first to second, my buddies would be wearing their drinks.

So I have felt the wrath of side loading and prefer my shifts to be throttle controlled.