200 whp

[Outlawstar98]

A welded LSD should hold more power then you need... mazdaspeed20035 was useing a welded LSD before this build he is doing now.

 

[Wagonbacker9]

A welded LSD should hold more power then you need... mazdaspeed20035 was useing a welded LSD before this build he is doing now.

however, he can't put anywhere near the power he's making on the ground... on drag slicks he'd send pieces of that transmission all over the european union.

 

[Outlawstar98]

yeah from the gears not LSD, and for 200whp, even 300 WHP can be held with the stock LSD, I have NEVER seen a LSD from the MSP with the internals of the LSD thrashed yet from having to much HP to blow it up. I would be WAY more worried about the gearing then the LSD if the LSD is welded.

 

[SeR_Cyclops]

however, he can't put anywhere near the power he's making on the ground... on drag slicks he'd send pieces of that transmission all over the european union.

(lol) funny but true.

 

[speedracer]

also, im not sure if you know this or not, but dropping the trans by itself without taking the engine out is extremely difficult, almost impossible

Not true at ALL!!!!I've done this 3 times and about to do it again. there is't much to it if you know your way around shop tools. The hardest part is getting the shaft lined up just right to get it to slide back in when you reinstall the trans. 4 jack stands, 2 jacks and some common knowledge of the car is about it.

 

[808MP5]

I got 209whp on stock internals

 

[SeR_Cyclops]

Not true at ALL!!!!I've done this 3 times and about to do it again. there is't much to it if you know your way around shop tools. The hardest part is getting the shaft lined up just right to get it to slide back in when you reinstall the trans. 4 jack stands, 2 jacks and some common knowledge of the car is about it.

I took the tranny out of the car with out taking out the motor. extremely easy. just make sure you have something to hold the motor up on that side. i used a 4x4 and a chain. then remove the battery and intake and all the stuff in the way. both axles and then all the wiring on the transmission and then just start taking out bolts. I like to take a box and push the bolts through the box so i know what order they came out just to make sure they go back in the same holes.

 

[speedracer]

yup thats exactly the way to do it. /\ /\
just have to get the car up high enough to slide the
trans out from underneath.a tranny jack helps too. lol
I did a walk through somewhere when I did mine. There are
a couple on here too that are easy to follow.

 

[HondaEat-R]

Taking the tranny out is not hard. Nor does it take long if you have tools, and a lift, and two friends help...

 

[edricci]

I couldn't see a difference in strength between welding the case of a new lsd or a used one. The weld is to keep the case from breaking has nothing to do with the internals of the lsd.
On a lot of rear wheel drive vehicles people weld the gears to lock both wheels similar to a spool, but to weld the case on the lsd it just strengthens the weak stock lsd case. The lsd will work the same, it will just take more abuse.

 

[justanothermp5]

well i guess i was just wrong overall in everything i posted
in personal experience, its very easy to take both the engine and trans out at the same time
but if you want only the trans out, then do what they say i guess

 

[dmention7]

I couldn't see a difference in strength between welding the case of a new lsd or a used one. The weld is to keep the case from breaking has nothing to do with the internals of the lsd.
On a lot of rear wheel drive vehicles people weld the gears to lock both wheels similar to a spool, but to weld the case on the lsd it just strengthens the weak stock lsd case. The lsd will work the same, it will just take more abuse.

zuku26 made a good point about the long-term exposure to oil and heat affecting the surface of the metal (as carbon is integrated into the metal's atomic structure) and possibly affecting the weld strength. My material science is a bit rusty, so I can't say much other that it's a valid concern in principle.

That would be the one issue with welding a used LSD... hard to say how much of a difference it would make in practice.



Also, it's comforting to hear that the tranny on this car comes out easily without removing the whole motor. I've done a FWD transmission where there was tons of clearance and the tranny went in and out like butter. I've also done one where a buddy and I spent almost two hours tweaking and finessing the damn thing out and back in because there wasn't enough room between the motor and the wheel well to clear the input shaft. I'll be doing a clutch this spring, and that was my one hangup on doing it myself, since I can't afford more than a weekend of downtime.

 

[Wagonbacker9]

I couldn't see a difference in strength between welding the case of a new lsd or a used one. The weld is to keep the case from breaking has nothing to do with the internals of the lsd.
On a lot of rear wheel drive vehicles people weld the gears to lock both wheels similar to a spool, but to weld the case on the lsd it just strengthens the weak stock lsd case. The lsd will work the same, it will just take more abuse.

there have been numerous reports of people breaking LSDs that were welded used... and none, or at most a couple new welded LSDs that have been broken. Oil penetration could have a lot to do with it, or microfractures in the metal prior to welding.

 

[Outlawstar98]

there have been numerous reports of people breaking LSDs that were welded used... and none, or at most a couple new welded LSDs that have been broken. Oil penetration could have a lot to do with it, or microfractures in the metal prior to welding.

Proof please.

 

[yudkib]

find the LSD failure list, there were several that failed when they were welded, but from memory most were running a good 275-300 whp. i dont think there were any on replaced, revised diffs

 

[Wagonbacker9]

Proof please.

I don't have the posts bookmarked, and given they were used, its possible the quality of the welds were questionable, but I believe I've read at least 4 different people breaking a used, then later welded LSD. but yes, the LSD failure list is where I believe I read at least some of them.

 

[Outlawstar98]

But was the failure because of the case, or the internals of it? That what I need to know, putting welds there even though its used will NEVER hurt it... it will still help it.

 

[Wagonbacker9]

But was the failure because of the case, or the internals of it? That what I need to know, putting welds there even though its used will NEVER hurt it... it will still help it.

agreed, and i believe each case (unless the poster there misunderstood) is a case failure.

I'm not aware of any of the LSD guts themselves failing.

 

[Outlawstar98]

agreed, and i believe each case (unless the poster there misunderstood) is a case failure.

I'm not aware of any of the LSD guts themselves failing.

It cam happen, do to many burnouts trying to be a ricer can blow it... or your trans.

 

[Wagonbacker9]

yeah, people don't generally report "this happened because I was being a stupid ricer" stuff... but yeah, I'm sure its happened. i hear my LSD at work on snow when the traction is mixed... hurts my ears every time.