Whats the best bang for my buck

[lee]

Where can I find some good gears for my 68 charger with a 742 case and I want to go with a 3.55 gear posi and spool any of you guys know or maybe have knowledge or wisedom of where to go to find such a thing  I have 2.76 no posi right now with a 400 horse 440 and I raced my cousin last night and he was starting to pull away until we meet to cars he has a 01 duramax chev deisel I won't live this down at the next family gathering uugghhh! Mine is the only dodge in the family  and thats what they will do thanks Lee

[Mean 318]

your car is still WAY cooler!

[alenglish]

I went with a set of 3.91's  and tall tires   to  get  somewhere in the 3.55 range   works for  me   Thx  Big Al

[Wheels of Terror]

I went with a set of 3.91's  and tall tires   to  get  somewhere in the 3.55 range   works for  me   Thx  Big Al

Good suggestion!!-I love the flowers on your slots man!

[lee]

Pink wasn't my first choice thats for sure anyone whats the best company out there for gears

[Ghoste]

There are a few places.  Randy's Ring and Pinion, Mancini's, Summit, any number of places can supply you a ring and pinion or a complete 3rd member with a Sure Grip already in there.  Just drop it in and go.  A spool is a different animal again and generally to be avoided for any street use.  It works in a straight line only and doesn't like to go around corners very much.  Pick up any Mopar magazine and you will find all kinds of places offering gear sets for your rear.  Good luck stomping your cousin in the rematch.

[aifilaw]

I wouldn't suggest a spool for the street causes some problems that I wouldn't want to deal with in daily driving, a regular sure-grip unit will work fine.

[1BAD68]

Where can I find some good gears for my 68 charger with a 742 case and I want to go with a 3.55 gear posi and spool any of you guys know or maybe have knowledge or wisedom of where to go to find such a thing  I have 2.76 no posi right now with a 400 horse 440 and I raced my cousin last night and he was starting to pull away until we meet to cars he has a 01 duramax chev deisel I won't live this down at the next family gathering uugghhh! Mine is the only dodge in the family  and thats what they will do thanks Lee

I just finished my 68 with a 2.76 open rear 742 case.
I searched ebay and found a used clutch style sure grip with a 742 case, contacted Doctor Diff over at Moparts for bearings, clutches, etc.., bought a set of 3.55 gears,  and then borrowed some tools that are needed to set it up. I have about 400 dollars in the whole thing and still have my other unit ready to go in if I want to get my gas mileage back.
You could spend a little more (500-600) and get one all ready to bolt in but the experience of doing it myself was worth it to me.
Stay away from a spool unless you are strictly racing.

[idahogrumpy]

My friend has an almost new set of richmond 4:10's for a 742 for sale. They were used for about 6 months, he went to 4:56's.     Idaho        Grumpy

[Ghoste]

Just for reference' sake for those who don't already know, the reason for avoiding a spool on the street is because there is NO differential action with it.  The gear assembly in a rearend is designed so that when you go around a corner, one wheel is able to turn at a different rate than the other side in order to compensate for the fact that the outer wheel will be travelling a greater distance as it's on the outside of the circle.  This compensating also results in a compromise from a traction point of view and all limited slips (be they a GM posi, Ford Traction Lock, Dodge Sure Grip or whatever) attempt to correct this through various means while still allowing some "differential" between the two axles when cornering.  A spool has NO differential.  It is the same drive to both axles and as long as tire inflation, diameter, and traction are the same on both sides, it is the ultimate for straight ahead getting it on.  When cornering though, the rear of the car will hop around in order for the inner wheel to be able to travel it's shorter distance in the same time as the outer wheel travels it's greater distance.  Acceptable for a drag racer making very few and very slow turns but very hard on parts on the street at best and very dangerous on vehicle control at worst.

[Purple440]

Just for reference' sake for those who don't already know, the reason for avoiding a spool on the street is because there is NO differential action with it.  The gear assembly in a rearend is designed so that when you go around a corner, one wheel is able to turn at a different rate than the other side in order to compensate for the fact that the outer wheel will be travelling a greater distance as it's on the outside of the circle.  This compensating also results in a compromise from a traction point of view and all limited slips (be they a GM posi, Ford Traction Lock, Dodge Sure Grip or whatever) attempt to correct this through various means while still allowing some "differential" between the two axles when cornering.  A spool has NO differential.  It is the same drive to both axles and as long as tire inflation, diameter, and traction are the same on both sides, it is the ultimate for straight ahead getting it on.  When cornering though, the rear of the car will hop around in order for the inner wheel to be able to travel it's shorter distance in the same time as the outer wheel travels it's greater distance.  Acceptable for a drag racer making very few and very slow turns but very hard on parts on the street at best and very dangerous on vehicle control at worst.

Thanks I was wondering what that was.

Lee, I like my 3.55 sure grip - good compromise between highway and take off.

[Chatt69chgr]

Strange Engineering makes the gears and they are made in the USA and they had a better price than anyone else.  Randy's Ring and Pinion is too high.  I guess they have to pay for all the advertising they do.  The clutch type suregrip is available new again.  Several places have it.  Or you can buy one at a swap meet and put a new clutch kit in it (if it needs one) Mopar P/N P4529484.  The same suregrip will fit all the cases.  You just need to maintain the correct differential bearings for the specific type of case you have.  The bearings are available at a number of places like Autozone, etc.  Don't forget to get the thrust bushings.  They are available from Mopar new too but I don't have the part number right off hand for them.