Everyone loves watching diesel drag racing and seeing how fast these full-size trucks can go, but something that is often overlooked is the safety of it all. Like anything else with more horsepower and torque, there is a breaking point. One part in particular that comes to mind is the flexplate. On these Ram trucks with the 47 and 48RE transmissions, some failures have been catastrophic.
Per NHRA protocol, any vehicle that runs 6.40 in the 1/8th, 10.00 in the 1/4-mile, or exceeds 135 mph, is required to have an SFI-rated flexplate shield unless you’re running an SFI-certified transmission case. Since those don’t exist for these transmissions, this is the only option. In the event of a flexplate explosion or the shearing of crankshaft bolts, this shield is 100-percent here to contain the flexplate inside the bell housing of the transmission and protect you, the driver, from catching any debris.
We stopped by and saw Logan Yelton of Loganbuilt Transmission And Race Fab to tour his place and talk about these flexplate shields. ” I saw a need for this product due to the popularity of diesel drag racing as it continues to grow. Virtually every Cummins-powered truck on the dragstrip is backed by one of these 47 or 48RE transmissions and there are quite a bit of competitors surpassing that 6.40/10.00 range,” Yelton said. With that being said, why hasn’t this been a tech issue already?
“Well, the truth is it didn’t exist. The tracks and track personnel knew that there wasn’t an option for these and they sort of just looked the other way. Nobody offered a flexplate shield for these transmissions so it was often overlooked,” said Yelton. Capitalizing, he dove headfirst into making this happen. Constructed out of 304 Stainless Steel, these laser-cut and laser-etched pieces are made right here in the United States and ship with an SFI-certified sticker making you race ready.
The SFI certification is good for five years of use and after five years of use, you can send your shield back in for inspection for recertification.
As for installation, it is simple. All that is required is the removal of your transmission dipstick and the top four transmission bell housing bolts. With these items removed, the shield slips into place and then you can replace your hardware where it was removed. Neither the engine nor transmission has to be loosened or moved, this can all be accomplished in a matter of a few minutes under the truck.
Coming in at $250, this flexplate shield is a must-have for anyone really pushing their trucks past mild. Yes, the NHRA certification is giving us a bare-minimum ET you should have this but realistically, this part is a good idea no matter the speed. Any flexplate can fail, any bolt can shear, why risk it for a mere $250. Protect yourself and protect the investments around these parts and get one today.
For those of you who are running with the Outlaw Diesel Super Series, all 5.90 Index and faster classes will require this from here on out. Per Gregg Jolly, ODSS Director, this will be enforced from here on out. Do yourself a favor and get yours coming so you don’t get turned around at the tech shack come 2021. For more information, head on over to the Loganbuilt Transmission And Race Fab Facebook page.